1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/altHashing.hpp"
27 #include "classfile/classLoaderData.inline.hpp"
28 #include "classfile/javaClasses.inline.hpp"
29 #include "classfile/moduleEntry.hpp"
30 #include "classfile/stringTable.hpp"
31 #include "classfile/vmSymbols.hpp"
32 #include "code/debugInfo.hpp"
33 #include "code/dependencyContext.hpp"
34 #include "code/pcDesc.hpp"
35 #include "interpreter/interpreter.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "memory/oopFactory.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "memory/universe.inline.hpp"
41 #include "oops/fieldStreams.hpp"
42 #include "oops/instanceKlass.hpp"
43 #include "oops/instanceMirrorKlass.hpp"
44 #include "oops/klass.hpp"
45 #include "oops/method.hpp"
46 #include "oops/objArrayOop.inline.hpp"
47 #include "oops/oop.inline.hpp"
48 #include "oops/symbol.hpp"
49 #include "oops/typeArrayOop.inline.hpp"
50 #include "prims/resolvedMethodTable.hpp"
51 #include "runtime/fieldDescriptor.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/interfaceSupport.hpp"
54 #include "runtime/java.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.inline.hpp"
57 #include "runtime/safepoint.hpp"
58 #include "runtime/thread.inline.hpp"
59 #include "runtime/vframe.hpp"
60 #include "utilities/align.hpp"
61 #include "utilities/preserveException.hpp"
62
63 #if INCLUDE_JVMCI
64 #include "jvmci/jvmciJavaClasses.hpp"
65 #endif
66
67 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \
68 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
69
70 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \
71 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
72
73 InjectedField JavaClasses::_injected_fields[] = {
74 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
75 };
76
77 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
78 return _injected_fields[id].compute_offset();
79 }
80
81
82 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
83 *field_count = 0;
84
85 vmSymbols::SID sid = vmSymbols::find_sid(class_name);
86 if (sid == vmSymbols::NO_SID) {
87 // Only well known classes can inject fields
88 return NULL;
89 }
90
91 int count = 0;
92 int start = -1;
93
94 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
95 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \
96 count++; \
97 if (start == -1) start = klass##_##name##_enum; \
98 }
99 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
100 #undef LOOKUP_INJECTED_FIELD
101
102 if (start != -1) {
103 *field_count = count;
104 return _injected_fields + start;
105 }
106 return NULL;
107 }
108
109
110 // Helpful routine for computing field offsets at run time rather than hardcoding them
111 // Finds local fields only, including static fields. Static field offsets are from the
112 // beginning of the mirror.
113 static void compute_offset(int &dest_offset,
114 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
115 bool is_static = false) {
116 fieldDescriptor fd;
117 if (ik == NULL) {
118 ResourceMark rm;
119 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
120 vm_exit_during_initialization("Invalid layout of preloaded class");
121 }
122
123 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
124 ResourceMark rm;
125 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
126 name_symbol->as_C_string(), signature_symbol->as_C_string());
127 #ifndef PRODUCT
128 // Prints all fields and offsets
129 Log(class) lt;
130 LogStream ls(lt.error());
131 ik->print_on(&ls);
132 #endif //PRODUCT
133 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
134 }
135 dest_offset = fd.offset();
136 }
137
138 // Overloading to pass name as a string.
139 static void compute_offset(int& dest_offset, InstanceKlass* ik,
140 const char* name_string, Symbol* signature_symbol,
141 bool is_static = false) {
142 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
143 if (name == NULL) {
144 ResourceMark rm;
145 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
146 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name());
147 }
148 compute_offset(dest_offset, ik, name, signature_symbol, is_static);
149 }
150
151 // Same as above but for "optional" offsets that might not be present in certain JDK versions
152 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this
153 // function should be removed.
154 static void
155 compute_optional_offset(int& dest_offset,
156 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) {
157 fieldDescriptor fd;
158 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) {
159 dest_offset = fd.offset();
160 }
161 }
162
163 int java_lang_String::value_offset = 0;
164 int java_lang_String::hash_offset = 0;
165 int java_lang_String::coder_offset = 0;
166
167 bool java_lang_String::initialized = false;
168
169 bool java_lang_String::is_instance(oop obj) {
170 return is_instance_inlined(obj);
171 }
172
173 void java_lang_String::compute_offsets() {
174 assert(!initialized, "offsets should be initialized only once");
175
176 InstanceKlass* k = SystemDictionary::String_klass();
177 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::byte_array_signature());
178 compute_offset(hash_offset, k, "hash", vmSymbols::int_signature());
179 compute_offset(coder_offset, k, "coder", vmSymbols::byte_signature());
180
181 initialized = true;
182 }
183
184 class CompactStringsFixup : public FieldClosure {
185 private:
186 bool _value;
187
188 public:
189 CompactStringsFixup(bool value) : _value(value) {}
190
191 void do_field(fieldDescriptor* fd) {
192 if (fd->name() == vmSymbols::compact_strings_name()) {
193 oop mirror = fd->field_holder()->java_mirror();
194 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
195 assert(mirror != NULL, "String must have mirror already");
196 mirror->bool_field_put(fd->offset(), _value);
197 }
198 }
199 };
200
201 void java_lang_String::set_compact_strings(bool value) {
202 CompactStringsFixup fix(value);
203 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix);
204 }
205
206 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
207 assert(initialized, "Must be initialized");
208 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
209
210 // Create the String object first, so there's a chance that the String
211 // and the char array it points to end up in the same cache line.
212 oop obj;
213 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
214
215 // Create the char array. The String object must be handlized here
216 // because GC can happen as a result of the allocation attempt.
217 Handle h_obj(THREAD, obj);
218 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
219 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
220
221 // Point the String at the char array
222 obj = h_obj();
223 set_value(obj, buffer);
224 // No need to zero the offset, allocation zero'ed the entire String object
225 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
226 return h_obj;
227 }
228
229 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
230 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
231 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
232 typeArrayOop buffer = value(h_obj());
233 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
234 if (is_latin1) {
235 for (int index = 0; index < length; index++) {
236 buffer->byte_at_put(index, (jbyte)unicode[index]);
237 }
238 } else {
239 for (int index = 0; index < length; index++) {
240 buffer->char_at_put(index, unicode[index]);
241 }
242 }
243
244 #ifdef ASSERT
245 {
246 ResourceMark rm;
247 char* expected = UNICODE::as_utf8(unicode, length);
248 char* actual = as_utf8_string(h_obj());
249 if (strcmp(expected, actual) != 0) {
250 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
251 ShouldNotReachHere();
252 }
253 }
254 #endif
255
256 return h_obj;
257 }
258
259 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
260 Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
261 return h_obj();
262 }
263
264 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
265 if (utf8_str == NULL) {
266 return Handle();
267 }
268 bool has_multibyte, is_latin1;
269 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
270 if (!CompactStrings) {
271 has_multibyte = true;
272 is_latin1 = false;
273 }
274
275 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
276 if (length > 0) {
277 if (!has_multibyte) {
278 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
279 } else if (is_latin1) {
280 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
281 } else {
282 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
283 }
284 }
285
286 #ifdef ASSERT
287 // This check is too strict because the input string is not necessarily valid UTF8.
288 // For example, it may be created with arbitrary content via jni_NewStringUTF.
289 /*
290 {
291 ResourceMark rm;
292 const char* expected = utf8_str;
293 char* actual = as_utf8_string(h_obj());
294 if (strcmp(expected, actual) != 0) {
295 tty->print_cr("String conversion failure: %s --> %s", expected, actual);
296 ShouldNotReachHere();
297 }
298 }
299 */
300 #endif
301
302 return h_obj;
303 }
304
305 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
306 Handle h_obj = create_from_str(utf8_str, CHECK_0);
307 return h_obj();
308 }
309
310 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
311 const char* utf8_str = (char*)symbol->bytes();
312 int utf8_len = symbol->utf8_length();
313
314 bool has_multibyte, is_latin1;
315 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
316 if (!CompactStrings) {
317 has_multibyte = true;
318 is_latin1 = false;
319 }
320
321 Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
322 if (length > 0) {
323 if (!has_multibyte) {
324 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length);
325 } else if (is_latin1) {
326 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
327 } else {
328 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
329 }
330 }
331
332 #ifdef ASSERT
333 {
334 ResourceMark rm;
335 const char* expected = symbol->as_utf8();
336 char* actual = as_utf8_string(h_obj());
337 if (strncmp(expected, actual, utf8_len) != 0) {
338 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
339 ShouldNotReachHere();
340 }
341 }
342 #endif
343
344 return h_obj;
345 }
346
347 // Converts a C string to a Java String based on current encoding
348 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
349 assert(str != NULL, "bad arguments");
350
351 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
352 static to_java_string_fn_t _to_java_string_fn = NULL;
353
354 if (_to_java_string_fn == NULL) {
355 void *lib_handle = os::native_java_library();
356 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
357 if (_to_java_string_fn == NULL) {
358 fatal("NewStringPlatform missing");
359 }
360 }
361
362 jstring js = NULL;
363 { JavaThread* thread = (JavaThread*)THREAD;
364 assert(thread->is_Java_thread(), "must be java thread");
365 HandleMark hm(thread);
366 ThreadToNativeFromVM ttn(thread);
367 js = (_to_java_string_fn)(thread->jni_environment(), str);
368 }
369 return Handle(THREAD, JNIHandles::resolve(js));
370 }
371
372 // Converts a Java String to a native C string that can be used for
373 // native OS calls.
374 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
375 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
376 static to_platform_string_fn_t _to_platform_string_fn = NULL;
377
378 if (_to_platform_string_fn == NULL) {
379 void *lib_handle = os::native_java_library();
380 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
381 if (_to_platform_string_fn == NULL) {
382 fatal("GetStringPlatformChars missing");
383 }
384 }
385
386 char *native_platform_string;
387 { JavaThread* thread = (JavaThread*)THREAD;
388 assert(thread->is_Java_thread(), "must be java thread");
389 JNIEnv *env = thread->jni_environment();
390 jstring js = (jstring) JNIHandles::make_local(env, java_string());
391 bool is_copy;
392 HandleMark hm(thread);
393 ThreadToNativeFromVM ttn(thread);
394 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
395 assert(is_copy == JNI_TRUE, "is_copy value changed");
396 JNIHandles::destroy_local(js);
397 }
398 return native_platform_string;
399 }
400
401 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
402 oop obj = java_string();
403 // Typical usage is to convert all '/' to '.' in string.
404 typeArrayOop value = java_lang_String::value(obj);
405 int length = java_lang_String::length(obj);
406 bool is_latin1 = java_lang_String::is_latin1(obj);
407
408 // First check if any from_char exist
409 int index; // Declared outside, used later
410 for (index = 0; index < length; index++) {
411 jchar c = !is_latin1 ? value->char_at(index) :
412 ((jchar) value->byte_at(index)) & 0xff;
413 if (c == from_char) {
414 break;
415 }
416 }
417 if (index == length) {
418 // No from_char, so do not copy.
419 return java_string;
420 }
421
422 // Check if result string will be latin1
423 bool to_is_latin1 = false;
424
425 // Replacement char must be latin1
426 if (CompactStrings && UNICODE::is_latin1(to_char)) {
427 if (is_latin1) {
428 // Source string is latin1 as well
429 to_is_latin1 = true;
430 } else if (!UNICODE::is_latin1(from_char)) {
431 // We are replacing an UTF16 char. Scan string to
432 // check if result can be latin1 encoded.
433 to_is_latin1 = true;
434 for (index = 0; index < length; index++) {
435 jchar c = value->char_at(index);
436 if (c != from_char && !UNICODE::is_latin1(c)) {
437 to_is_latin1 = false;
438 break;
439 }
440 }
441 }
442 }
443
444 // Create new UNICODE (or byte) buffer. Must handlize value because GC
445 // may happen during String and char array creation.
446 typeArrayHandle h_value(THREAD, value);
447 Handle string = basic_create(length, to_is_latin1, CHECK_NH);
448 typeArrayOop from_buffer = h_value();
449 typeArrayOop to_buffer = java_lang_String::value(string());
450
451 // Copy contents
452 for (index = 0; index < length; index++) {
453 jchar c = (!is_latin1) ? from_buffer->char_at(index) :
454 ((jchar) from_buffer->byte_at(index)) & 0xff;
455 if (c == from_char) {
456 c = to_char;
457 }
458 if (!to_is_latin1) {
459 to_buffer->char_at_put(index, c);
460 } else {
461 to_buffer->byte_at_put(index, (jbyte) c);
462 }
463 }
464 return string;
465 }
466
467 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
468 typeArrayOop value = java_lang_String::value(java_string);
469 length = java_lang_String::length(java_string);
470 bool is_latin1 = java_lang_String::is_latin1(java_string);
471
472 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
473 if (result != NULL) {
474 if (!is_latin1) {
475 for (int index = 0; index < length; index++) {
476 result[index] = value->char_at(index);
477 }
478 } else {
479 for (int index = 0; index < length; index++) {
480 result[index] = ((jchar) value->byte_at(index)) & 0xff;
481 }
482 }
483 } else {
484 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
485 }
486 return result;
487 }
488
489 unsigned int java_lang_String::hash_code(oop java_string) {
490 int length = java_lang_String::length(java_string);
491 // Zero length string will hash to zero with String.hashCode() function.
492 if (length == 0) return 0;
493
494 typeArrayOop value = java_lang_String::value(java_string);
495 bool is_latin1 = java_lang_String::is_latin1(java_string);
496
497 if (is_latin1) {
498 return java_lang_String::hash_code(value->byte_at_addr(0), length);
499 } else {
500 return java_lang_String::hash_code(value->char_at_addr(0), length);
501 }
502 }
503
504 char* java_lang_String::as_quoted_ascii(oop java_string) {
505 typeArrayOop value = java_lang_String::value(java_string);
506 int length = java_lang_String::length(java_string);
507 bool is_latin1 = java_lang_String::is_latin1(java_string);
508
509 if (length == 0) return NULL;
510
511 char* result;
512 int result_length;
513 if (!is_latin1) {
514 jchar* base = value->char_at_addr(0);
515 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
516 result = NEW_RESOURCE_ARRAY(char, result_length);
517 UNICODE::as_quoted_ascii(base, length, result, result_length);
518 } else {
519 jbyte* base = value->byte_at_addr(0);
520 result_length = UNICODE::quoted_ascii_length(base, length) + 1;
521 result = NEW_RESOURCE_ARRAY(char, result_length);
522 UNICODE::as_quoted_ascii(base, length, result, result_length);
523 }
524 assert(result_length >= length + 1, "must not be shorter");
525 assert(result_length == (int)strlen(result) + 1, "must match");
526 return result;
527 }
528
529 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) {
530 typeArrayOop value = java_lang_String::value(java_string);
531 int length = java_lang_String::length(java_string);
532 bool is_latin1 = java_lang_String::is_latin1(java_string);
533 if (!is_latin1) {
534 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
535 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
536 return sym;
537 } else {
538 ResourceMark rm;
539 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
540 const char* base = UNICODE::as_utf8(position, length);
541 Symbol* sym = SymbolTable::lookup(base, length, THREAD);
542 return sym;
543 }
544 }
545
546 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
547 typeArrayOop value = java_lang_String::value(java_string);
548 int length = java_lang_String::length(java_string);
549 bool is_latin1 = java_lang_String::is_latin1(java_string);
550 if (!is_latin1) {
551 jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
552 return SymbolTable::probe_unicode(base, length);
553 } else {
554 ResourceMark rm;
555 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
556 const char* base = UNICODE::as_utf8(position, length);
557 return SymbolTable::probe(base, length);
558 }
559 }
560
561 int java_lang_String::utf8_length(oop java_string) {
562 typeArrayOop value = java_lang_String::value(java_string);
563 int length = java_lang_String::length(java_string);
564 bool is_latin1 = java_lang_String::is_latin1(java_string);
565 if (length == 0) {
566 return 0;
567 }
568 if (!is_latin1) {
569 return UNICODE::utf8_length(value->char_at_addr(0), length);
570 } else {
571 return UNICODE::utf8_length(value->byte_at_addr(0), length);
572 }
573 }
574
575 char* java_lang_String::as_utf8_string(oop java_string) {
576 typeArrayOop value = java_lang_String::value(java_string);
577 int length = java_lang_String::length(java_string);
578 bool is_latin1 = java_lang_String::is_latin1(java_string);
579 if (!is_latin1) {
580 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
581 return UNICODE::as_utf8(position, length);
582 } else {
583 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
584 return UNICODE::as_utf8(position, length);
585 }
586 }
587
588 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
589 typeArrayOop value = java_lang_String::value(java_string);
590 int length = java_lang_String::length(java_string);
591 bool is_latin1 = java_lang_String::is_latin1(java_string);
592 if (!is_latin1) {
593 jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
594 return UNICODE::as_utf8(position, length, buf, buflen);
595 } else {
596 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
597 return UNICODE::as_utf8(position, length, buf, buflen);
598 }
599 }
600
601 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
602 typeArrayOop value = java_lang_String::value(java_string);
603 int length = java_lang_String::length(java_string);
604 assert(start + len <= length, "just checking");
605 bool is_latin1 = java_lang_String::is_latin1(java_string);
606 if (!is_latin1) {
607 jchar* position = value->char_at_addr(start);
608 return UNICODE::as_utf8(position, len);
609 } else {
610 jbyte* position = value->byte_at_addr(start);
611 return UNICODE::as_utf8(position, len);
612 }
613 }
614
615 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
616 typeArrayOop value = java_lang_String::value(java_string);
617 int length = java_lang_String::length(java_string);
618 assert(start + len <= length, "just checking");
619 bool is_latin1 = java_lang_String::is_latin1(java_string);
620 if (!is_latin1) {
621 jchar* position = value->char_at_addr(start);
622 return UNICODE::as_utf8(position, len, buf, buflen);
623 } else {
624 jbyte* position = value->byte_at_addr(start);
625 return UNICODE::as_utf8(position, len, buf, buflen);
626 }
627 }
628
629 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
630 assert(java_string->klass() == SystemDictionary::String_klass(),
631 "must be java_string");
632 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
633 int length = java_lang_String::length(java_string);
634 if (length != len) {
635 return false;
636 }
637 bool is_latin1 = java_lang_String::is_latin1(java_string);
638 if (!is_latin1) {
639 for (int i = 0; i < len; i++) {
640 if (value->char_at(i) != chars[i]) {
641 return false;
642 }
643 }
644 } else {
645 for (int i = 0; i < len; i++) {
646 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
647 return false;
648 }
649 }
650 }
651 return true;
652 }
653
654 bool java_lang_String::equals(oop str1, oop str2) {
655 assert(str1->klass() == SystemDictionary::String_klass(),
656 "must be java String");
657 assert(str2->klass() == SystemDictionary::String_klass(),
658 "must be java String");
659 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1);
660 int length1 = java_lang_String::length(value1);
661 bool is_latin1 = java_lang_String::is_latin1(str1);
662 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2);
663 int length2 = java_lang_String::length(value2);
664 bool is_latin2 = java_lang_String::is_latin1(str2);
665
666 if ((length1 != length2) || (is_latin1 != is_latin2)) {
667 // Strings of different size or with different
668 // coders are never equal.
669 return false;
670 }
671 int blength1 = value1->length();
672 for (int i = 0; i < blength1; i++) {
673 if (value1->byte_at(i) != value2->byte_at(i)) {
674 return false;
675 }
676 }
677 return true;
678 }
679
680 void java_lang_String::print(oop java_string, outputStream* st) {
681 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
682 typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
683
684 if (value == NULL) {
685 // This can happen if, e.g., printing a String
686 // object before its initializer has been called
687 st->print("NULL");
688 return;
689 }
690
691 int length = java_lang_String::length(java_string);
692 bool is_latin1 = java_lang_String::is_latin1(java_string);
693
694 st->print("\"");
695 for (int index = 0; index < length; index++) {
696 st->print("%c", (!is_latin1) ? value->char_at(index) :
697 ((jchar) value->byte_at(index)) & 0xff );
698 }
699 st->print("\"");
700 }
701
702
703 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
704 assert(mirror.not_null() && fd->is_static(), "just checking");
705 if (fd->has_initial_value()) {
706 BasicType t = fd->field_type();
707 switch (t) {
708 case T_BYTE:
709 mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
710 break;
711 case T_BOOLEAN:
712 mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
713 break;
714 case T_CHAR:
715 mirror()->char_field_put(fd->offset(), fd->int_initial_value());
716 break;
717 case T_SHORT:
718 mirror()->short_field_put(fd->offset(), fd->int_initial_value());
719 break;
720 case T_INT:
721 mirror()->int_field_put(fd->offset(), fd->int_initial_value());
722 break;
723 case T_FLOAT:
724 mirror()->float_field_put(fd->offset(), fd->float_initial_value());
725 break;
726 case T_DOUBLE:
727 mirror()->double_field_put(fd->offset(), fd->double_initial_value());
728 break;
729 case T_LONG:
730 mirror()->long_field_put(fd->offset(), fd->long_initial_value());
731 break;
732 case T_OBJECT:
733 {
734 #ifdef ASSERT
735 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
736 assert(fd->signature() == sym, "just checking");
737 #endif
738 oop string = fd->string_initial_value(CHECK);
739 mirror()->obj_field_put(fd->offset(), string);
740 }
741 break;
742 default:
743 THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
744 "Illegal ConstantValue attribute in class file");
745 }
746 }
747 }
748
749
750 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
751 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
752
753 // If the offset was read from the shared archive, it was fixed up already
754 if (!k->is_shared()) {
755 if (k->is_instance_klass()) {
756 // During bootstrap, java.lang.Class wasn't loaded so static field
757 // offsets were computed without the size added it. Go back and
758 // update all the static field offsets to included the size.
759 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
760 if (fs.access_flags().is_static()) {
761 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
762 fs.set_offset(real_offset);
763 }
764 }
765 }
766 }
767 create_mirror(k, Handle(), Handle(), Handle(), CHECK);
768 }
769
770 void java_lang_Class::initialize_mirror_fields(Klass* k,
771 Handle mirror,
772 Handle protection_domain,
773 TRAPS) {
774 // Allocate a simple java object for a lock.
775 // This needs to be a java object because during class initialization
776 // it can be held across a java call.
777 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
778 set_init_lock(mirror(), r);
779
780 // Set protection domain also
781 set_protection_domain(mirror(), protection_domain());
782
783 // Initialize static fields
784 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
785 }
786
787 // Set the java.lang.Module module field in the java_lang_Class mirror
788 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
789 if (module.is_null()) {
790 // During startup, the module may be NULL only if java.base has not been defined yet.
791 // Put the class on the fixup_module_list to patch later when the java.lang.Module
792 // for java.base is known.
793 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization");
794
795 bool javabase_was_defined = false;
796 {
797 MutexLocker m1(Module_lock, THREAD);
798 // Keep list of classes needing java.base module fixup
799 if (!ModuleEntryTable::javabase_defined()) {
800 assert(k->java_mirror() != NULL, "Class's mirror is null");
801 k->class_loader_data()->inc_keep_alive();
802 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
803 fixup_module_field_list()->push(k);
804 } else {
805 javabase_was_defined = true;
806 }
807 }
808
809 // If java.base was already defined then patch this particular class with java.base.
810 if (javabase_was_defined) {
811 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
812 assert(javabase_entry != NULL && javabase_entry->module() != NULL,
813 "Setting class module field, " JAVA_BASE_NAME " should be defined");
814 Handle javabase_handle(THREAD, javabase_entry->module());
815 set_module(mirror(), javabase_handle());
816 }
817 } else {
818 assert(Universe::is_module_initialized() ||
819 (ModuleEntryTable::javabase_defined() &&
820 (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
821 "Incorrect java.lang.Module specification while creating mirror");
822 set_module(mirror(), module());
823 }
824 }
825
826 // Statically allocate fixup lists because they always get created.
827 void java_lang_Class::allocate_fixup_lists() {
828 GrowableArray<Klass*>* mirror_list =
829 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
830 set_fixup_mirror_list(mirror_list);
831
832 GrowableArray<Klass*>* module_list =
833 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
834 set_fixup_module_field_list(module_list);
835 }
836
837 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
838 Handle module, Handle protection_domain, TRAPS) {
839 assert(k != NULL, "Use create_basic_type_mirror for primitive types");
840 assert(k->java_mirror() == NULL, "should only assign mirror once");
841
842 // Use this moment of initialization to cache modifier_flags also,
843 // to support Class.getModifiers(). Instance classes recalculate
844 // the cached flags after the class file is parsed, but before the
845 // class is put into the system dictionary.
846 int computed_modifiers = k->compute_modifier_flags(CHECK);
847 k->set_modifier_flags(computed_modifiers);
848 // Class_klass has to be loaded because it is used to allocate
849 // the mirror.
850 if (SystemDictionary::Class_klass_loaded()) {
851 // Allocate mirror (java.lang.Class instance)
852 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
853 Handle mirror(THREAD, mirror_oop);
854 Handle comp_mirror;
855
856 // Setup indirection from mirror->klass
857 java_lang_Class::set_klass(mirror(), k);
858
859 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
860 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
861
862 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
863
864 // It might also have a component mirror. This mirror must already exist.
865 if (k->is_array_klass()) {
866 if (k->is_typeArray_klass()) {
867 BasicType type = TypeArrayKlass::cast(k)->element_type();
868 comp_mirror = Handle(THREAD, Universe::java_mirror(type));
869 } else {
870 assert(k->is_objArray_klass(), "Must be");
871 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
872 assert(element_klass != NULL, "Must have an element klass");
873 comp_mirror = Handle(THREAD, element_klass->java_mirror());
874 }
875 assert(comp_mirror() != NULL, "must have a mirror");
876
877 // Two-way link between the array klass and its component mirror:
878 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
879 set_component_mirror(mirror(), comp_mirror());
880 // See below for ordering dependencies between field array_klass in component mirror
881 // and java_mirror in this klass.
882 } else {
883 assert(k->is_instance_klass(), "Must be");
884
885 initialize_mirror_fields(k, mirror, protection_domain, THREAD);
886 if (HAS_PENDING_EXCEPTION) {
887 // If any of the fields throws an exception like OOM remove the klass field
888 // from the mirror so GC doesn't follow it after the klass has been deallocated.
889 // This mirror looks like a primitive type, which logically it is because it
890 // it represents no class.
891 java_lang_Class::set_klass(mirror(), NULL);
892 return;
893 }
894 }
895
896 // set the classLoader field in the java_lang_Class instance
897 assert(class_loader() == k->class_loader(), "should be same");
898 set_class_loader(mirror(), class_loader());
899
900 // Setup indirection from klass->mirror
901 // after any exceptions can happen during allocations.
902 k->set_java_mirror(mirror);
903
904 // Set the module field in the java_lang_Class instance. This must be done
905 // after the mirror is set.
906 set_mirror_module_field(k, mirror, module, THREAD);
907
908 if (comp_mirror() != NULL) {
909 // Set after k->java_mirror() is published, because compiled code running
910 // concurrently doesn't expect a k to have a null java_mirror.
911 release_set_array_klass(comp_mirror(), k);
912 }
913 } else {
914 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
915 fixup_mirror_list()->push(k);
916 }
917 }
918
919 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
920 assert(_module_offset != 0, "must have been computed already");
921 java_lang_Class::set_module(k->java_mirror(), module());
922 }
923
924 int java_lang_Class::oop_size(oop java_class) {
925 assert(_oop_size_offset != 0, "must be set");
926 int size = java_class->int_field(_oop_size_offset);
927 assert(size > 0, "Oop size must be greater than zero, not %d", size);
928 return size;
929 }
930
931 void java_lang_Class::set_oop_size(oop java_class, int size) {
932 assert(_oop_size_offset != 0, "must be set");
933 assert(size > 0, "Oop size must be greater than zero, not %d", size);
934 java_class->int_field_put(_oop_size_offset, size);
935 }
936
937 int java_lang_Class::static_oop_field_count(oop java_class) {
938 assert(_static_oop_field_count_offset != 0, "must be set");
939 return java_class->int_field(_static_oop_field_count_offset);
940 }
941 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
942 assert(_static_oop_field_count_offset != 0, "must be set");
943 java_class->int_field_put(_static_oop_field_count_offset, size);
944 }
945
946 oop java_lang_Class::protection_domain(oop java_class) {
947 assert(_protection_domain_offset != 0, "must be set");
948 return java_class->obj_field(_protection_domain_offset);
949 }
950 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
951 assert(_protection_domain_offset != 0, "must be set");
952 java_class->obj_field_put(_protection_domain_offset, pd);
953 }
954
955 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
956 assert(_component_mirror_offset != 0, "must be set");
957 java_class->obj_field_put(_component_mirror_offset, comp_mirror);
958 }
959 oop java_lang_Class::component_mirror(oop java_class) {
960 assert(_component_mirror_offset != 0, "must be set");
961 return java_class->obj_field(_component_mirror_offset);
962 }
963
964 oop java_lang_Class::init_lock(oop java_class) {
965 assert(_init_lock_offset != 0, "must be set");
966 return java_class->obj_field(_init_lock_offset);
967 }
968 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
969 assert(_init_lock_offset != 0, "must be set");
970 java_class->obj_field_put(_init_lock_offset, init_lock);
971 }
972
973 objArrayOop java_lang_Class::signers(oop java_class) {
974 assert(_signers_offset != 0, "must be set");
975 return (objArrayOop)java_class->obj_field(_signers_offset);
976 }
977 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
978 assert(_signers_offset != 0, "must be set");
979 java_class->obj_field_put(_signers_offset, (oop)signers);
980 }
981
982
983 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
984 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
985 if (_class_loader_offset != 0) {
986 java_class->obj_field_put(_class_loader_offset, loader);
987 }
988 }
989
990 oop java_lang_Class::class_loader(oop java_class) {
991 assert(_class_loader_offset != 0, "must be set");
992 return java_class->obj_field(_class_loader_offset);
993 }
994
995 oop java_lang_Class::module(oop java_class) {
996 assert(_module_offset != 0, "must be set");
997 return java_class->obj_field(_module_offset);
998 }
999
1000 void java_lang_Class::set_module(oop java_class, oop module) {
1001 assert(_module_offset != 0, "must be set");
1002 java_class->obj_field_put(_module_offset, module);
1003 }
1004
1005 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1006 // This should be improved by adding a field at the Java level or by
1007 // introducing a new VM klass (see comment in ClassFileParser)
1008 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1009 if (type != T_VOID) {
1010 Klass* aklass = Universe::typeArrayKlassObj(type);
1011 assert(aklass != NULL, "correct bootstrap");
1012 release_set_array_klass(java_class, aklass);
1013 }
1014 #ifdef ASSERT
1015 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1016 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1017 #endif
1018 return java_class;
1019 }
1020
1021
1022 Klass* java_lang_Class::as_Klass(oop java_class) {
1023 //%note memory_2
1024 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1025 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1026 assert(k == NULL || k->is_klass(), "type check");
1027 return k;
1028 }
1029
1030
1031 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1032 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1033 java_class->metadata_field_put(_klass_offset, klass);
1034 }
1035
1036
1037 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1038 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1039 Symbol* name = NULL;
1040 bool is_instance = false;
1041 if (is_primitive(java_class)) {
1042 name = vmSymbols::type_signature(primitive_type(java_class));
1043 } else {
1044 Klass* k = as_Klass(java_class);
1045 is_instance = k->is_instance_klass();
1046 name = k->name();
1047 }
1048 if (name == NULL) {
1049 st->print("<null>");
1050 return;
1051 }
1052 if (is_instance) st->print("L");
1053 st->write((char*) name->base(), (int) name->utf8_length());
1054 if (is_instance) st->print(";");
1055 }
1056
1057 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
1058 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1059 Symbol* name;
1060 if (is_primitive(java_class)) {
1061 name = vmSymbols::type_signature(primitive_type(java_class));
1062 // Because this can create a new symbol, the caller has to decrement
1063 // the refcount, so make adjustment here and below for symbols returned
1064 // that are not created or incremented due to a successful lookup.
1065 name->increment_refcount();
1066 } else {
1067 Klass* k = as_Klass(java_class);
1068 if (!k->is_instance_klass()) {
1069 name = k->name();
1070 name->increment_refcount();
1071 } else {
1072 ResourceMark rm;
1073 const char* sigstr = k->signature_name();
1074 int siglen = (int) strlen(sigstr);
1075 if (!intern_if_not_found) {
1076 name = SymbolTable::probe(sigstr, siglen);
1077 } else {
1078 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
1079 }
1080 }
1081 }
1082 return name;
1083 }
1084
1085 // Returns the Java name for this Java mirror (Resource allocated)
1086 // See Klass::external_name().
1087 // For primitive type Java mirrors, its type name is returned.
1088 const char* java_lang_Class::as_external_name(oop java_class) {
1089 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1090 const char* name = NULL;
1091 if (is_primitive(java_class)) {
1092 name = type2name(primitive_type(java_class));
1093 } else {
1094 name = as_Klass(java_class)->external_name();
1095 }
1096 if (name == NULL) {
1097 name = "<null>";
1098 }
1099 return name;
1100 }
1101
1102 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1103 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1104 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1105 return k;
1106 }
1107
1108
1109 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1110 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1111 java_class->release_metadata_field_put(_array_klass_offset, klass);
1112 }
1113
1114
1115 bool java_lang_Class::is_primitive(oop java_class) {
1116 // should assert:
1117 //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1118 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
1119
1120 #ifdef ASSERT
1121 if (is_primitive) {
1122 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
1123 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
1124 "Should be either the T_VOID primitive or a java primitive");
1125 }
1126 #endif
1127
1128 return is_primitive;
1129 }
1130
1131
1132 BasicType java_lang_Class::primitive_type(oop java_class) {
1133 assert(java_lang_Class::is_primitive(java_class), "just checking");
1134 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1135 BasicType type = T_VOID;
1136 if (ak != NULL) {
1137 // Note: create_basic_type_mirror above initializes ak to a non-null value.
1138 type = ArrayKlass::cast(ak)->element_type();
1139 } else {
1140 assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1141 }
1142 assert(Universe::java_mirror(type) == java_class, "must be consistent");
1143 return type;
1144 }
1145
1146 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1147 assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1148 if (is_primitive(java_class)) {
1149 if (reference_klass != NULL)
1150 (*reference_klass) = NULL;
1151 return primitive_type(java_class);
1152 } else {
1153 if (reference_klass != NULL)
1154 (*reference_klass) = as_Klass(java_class);
1155 return T_OBJECT;
1156 }
1157 }
1158
1159
1160 oop java_lang_Class::primitive_mirror(BasicType t) {
1161 oop mirror = Universe::java_mirror(t);
1162 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1163 assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1164 return mirror;
1165 }
1166
1167 bool java_lang_Class::offsets_computed = false;
1168 int java_lang_Class::classRedefinedCount_offset = -1;
1169
1170 void java_lang_Class::compute_offsets() {
1171 assert(!offsets_computed, "offsets should be initialized only once");
1172 offsets_computed = true;
1173
1174 InstanceKlass* k = SystemDictionary::Class_klass();
1175 compute_offset(classRedefinedCount_offset, k, "classRedefinedCount", vmSymbols::int_signature());
1176 compute_offset(_class_loader_offset, k, "classLoader", vmSymbols::classloader_signature());
1177 compute_offset(_component_mirror_offset, k, "componentType", vmSymbols::class_signature());
1178 compute_offset(_module_offset, k, "module", vmSymbols::module_signature());
1179
1180 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have
1181 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops
1182 // GC treats them the same.
1183 _init_lock_offset = _component_mirror_offset;
1184
1185 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1186 }
1187
1188 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1189 if (classRedefinedCount_offset == -1) {
1190 // If we don't have an offset for it then just return -1 as a marker.
1191 return -1;
1192 }
1193
1194 return the_class_mirror->int_field(classRedefinedCount_offset);
1195 }
1196
1197 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1198 if (classRedefinedCount_offset == -1) {
1199 // If we don't have an offset for it then nothing to set.
1200 return;
1201 }
1202
1203 the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1204 }
1205
1206
1207 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1208 // platform thread structure, and a eetop offset which was used for thread
1209 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1210 // merged, so in the HotSpot VM we just use the eetop field for the thread
1211 // instead of the privateInfo_offset.
1212 //
1213 // Note: The stackSize field is only present starting in 1.4.
1214
1215 int java_lang_Thread::_name_offset = 0;
1216 int java_lang_Thread::_group_offset = 0;
1217 int java_lang_Thread::_contextClassLoader_offset = 0;
1218 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1219 int java_lang_Thread::_priority_offset = 0;
1220 int java_lang_Thread::_eetop_offset = 0;
1221 int java_lang_Thread::_daemon_offset = 0;
1222 int java_lang_Thread::_stillborn_offset = 0;
1223 int java_lang_Thread::_stackSize_offset = 0;
1224 int java_lang_Thread::_tid_offset = 0;
1225 int java_lang_Thread::_thread_status_offset = 0;
1226 int java_lang_Thread::_park_blocker_offset = 0;
1227 int java_lang_Thread::_park_event_offset = 0 ;
1228
1229
1230 void java_lang_Thread::compute_offsets() {
1231 assert(_group_offset == 0, "offsets should be initialized only once");
1232
1233 InstanceKlass* k = SystemDictionary::Thread_klass();
1234 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1235 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature());
1236 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(),
1237 vmSymbols::classloader_signature());
1238 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(),
1239 vmSymbols::accesscontrolcontext_signature());
1240 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature());
1241 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1242 compute_offset(_eetop_offset, k, "eetop", vmSymbols::long_signature());
1243 compute_offset(_stillborn_offset, k, "stillborn", vmSymbols::bool_signature());
1244 compute_offset(_stackSize_offset, k, "stackSize", vmSymbols::long_signature());
1245 compute_offset(_tid_offset, k, "tid", vmSymbols::long_signature());
1246 compute_offset(_thread_status_offset, k, "threadStatus", vmSymbols::int_signature());
1247 compute_offset(_park_blocker_offset, k, "parkBlocker", vmSymbols::object_signature());
1248 compute_offset(_park_event_offset, k, "nativeParkEventPointer", vmSymbols::long_signature());
1249 }
1250
1251
1252 JavaThread* java_lang_Thread::thread(oop java_thread) {
1253 return (JavaThread*)java_thread->address_field(_eetop_offset);
1254 }
1255
1256
1257 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1258 java_thread->address_field_put(_eetop_offset, (address)thread);
1259 }
1260
1261
1262 oop java_lang_Thread::name(oop java_thread) {
1263 return java_thread->obj_field(_name_offset);
1264 }
1265
1266
1267 void java_lang_Thread::set_name(oop java_thread, oop name) {
1268 java_thread->obj_field_put(_name_offset, name);
1269 }
1270
1271
1272 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1273 return (ThreadPriority)java_thread->int_field(_priority_offset);
1274 }
1275
1276
1277 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1278 java_thread->int_field_put(_priority_offset, priority);
1279 }
1280
1281
1282 oop java_lang_Thread::threadGroup(oop java_thread) {
1283 return java_thread->obj_field(_group_offset);
1284 }
1285
1286
1287 bool java_lang_Thread::is_stillborn(oop java_thread) {
1288 return java_thread->bool_field(_stillborn_offset) != 0;
1289 }
1290
1291
1292 // We never have reason to turn the stillborn bit off
1293 void java_lang_Thread::set_stillborn(oop java_thread) {
1294 java_thread->bool_field_put(_stillborn_offset, true);
1295 }
1296
1297
1298 bool java_lang_Thread::is_alive(oop java_thread) {
1299 JavaThread* thr = java_lang_Thread::thread(java_thread);
1300 return (thr != NULL);
1301 }
1302
1303
1304 bool java_lang_Thread::is_daemon(oop java_thread) {
1305 return java_thread->bool_field(_daemon_offset) != 0;
1306 }
1307
1308
1309 void java_lang_Thread::set_daemon(oop java_thread) {
1310 java_thread->bool_field_put(_daemon_offset, true);
1311 }
1312
1313 oop java_lang_Thread::context_class_loader(oop java_thread) {
1314 return java_thread->obj_field(_contextClassLoader_offset);
1315 }
1316
1317 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1318 return java_thread->obj_field(_inheritedAccessControlContext_offset);
1319 }
1320
1321
1322 jlong java_lang_Thread::stackSize(oop java_thread) {
1323 if (_stackSize_offset > 0) {
1324 return java_thread->long_field(_stackSize_offset);
1325 } else {
1326 return 0;
1327 }
1328 }
1329
1330 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1331 void java_lang_Thread::set_thread_status(oop java_thread,
1332 java_lang_Thread::ThreadStatus status) {
1333 // The threadStatus is only present starting in 1.5
1334 if (_thread_status_offset > 0) {
1335 java_thread->int_field_put(_thread_status_offset, status);
1336 }
1337 }
1338
1339 // Read thread status value from threadStatus field in java.lang.Thread java class.
1340 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1341 // Make sure the caller is operating on behalf of the VM or is
1342 // running VM code (state == _thread_in_vm).
1343 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1344 JavaThread::current()->thread_state() == _thread_in_vm,
1345 "Java Thread is not running in vm");
1346 // The threadStatus is only present starting in 1.5
1347 if (_thread_status_offset > 0) {
1348 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1349 } else {
1350 // All we can easily figure out is if it is alive, but that is
1351 // enough info for a valid unknown status.
1352 // These aren't restricted to valid set ThreadStatus values, so
1353 // use JVMTI values and cast.
1354 JavaThread* thr = java_lang_Thread::thread(java_thread);
1355 if (thr == NULL) {
1356 // the thread hasn't run yet or is in the process of exiting
1357 return NEW;
1358 }
1359 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1360 }
1361 }
1362
1363
1364 jlong java_lang_Thread::thread_id(oop java_thread) {
1365 // The thread ID field is only present starting in 1.5
1366 if (_tid_offset > 0) {
1367 return java_thread->long_field(_tid_offset);
1368 } else {
1369 return 0;
1370 }
1371 }
1372
1373 oop java_lang_Thread::park_blocker(oop java_thread) {
1374 assert(JDK_Version::current().supports_thread_park_blocker() &&
1375 _park_blocker_offset != 0, "Must support parkBlocker field");
1376
1377 if (_park_blocker_offset > 0) {
1378 return java_thread->obj_field(_park_blocker_offset);
1379 }
1380
1381 return NULL;
1382 }
1383
1384 jlong java_lang_Thread::park_event(oop java_thread) {
1385 if (_park_event_offset > 0) {
1386 return java_thread->long_field(_park_event_offset);
1387 }
1388 return 0;
1389 }
1390
1391 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1392 if (_park_event_offset > 0) {
1393 java_thread->long_field_put(_park_event_offset, ptr);
1394 return true;
1395 }
1396 return false;
1397 }
1398
1399
1400 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1401 assert(_thread_status_offset != 0, "Must have thread status");
1402 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1403 switch (status) {
1404 case NEW : return "NEW";
1405 case RUNNABLE : return "RUNNABLE";
1406 case SLEEPING : return "TIMED_WAITING (sleeping)";
1407 case IN_OBJECT_WAIT : return "WAITING (on object monitor)";
1408 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)";
1409 case PARKED : return "WAITING (parking)";
1410 case PARKED_TIMED : return "TIMED_WAITING (parking)";
1411 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1412 case TERMINATED : return "TERMINATED";
1413 default : return "UNKNOWN";
1414 };
1415 }
1416 int java_lang_ThreadGroup::_parent_offset = 0;
1417 int java_lang_ThreadGroup::_name_offset = 0;
1418 int java_lang_ThreadGroup::_threads_offset = 0;
1419 int java_lang_ThreadGroup::_groups_offset = 0;
1420 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1421 int java_lang_ThreadGroup::_destroyed_offset = 0;
1422 int java_lang_ThreadGroup::_daemon_offset = 0;
1423 int java_lang_ThreadGroup::_nthreads_offset = 0;
1424 int java_lang_ThreadGroup::_ngroups_offset = 0;
1425
1426 oop java_lang_ThreadGroup::parent(oop java_thread_group) {
1427 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1428 return java_thread_group->obj_field(_parent_offset);
1429 }
1430
1431 // ("name as oop" accessor is not necessary)
1432
1433 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1434 oop name = java_thread_group->obj_field(_name_offset);
1435 // ThreadGroup.name can be null
1436 if (name != NULL) {
1437 return java_lang_String::as_utf8_string(name);
1438 }
1439 return NULL;
1440 }
1441
1442 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1443 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1444 return java_thread_group->int_field(_nthreads_offset);
1445 }
1446
1447 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1448 oop threads = java_thread_group->obj_field(_threads_offset);
1449 assert(threads != NULL, "threadgroups should have threads");
1450 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1451 return objArrayOop(threads);
1452 }
1453
1454 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1455 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1456 return java_thread_group->int_field(_ngroups_offset);
1457 }
1458
1459 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1460 oop groups = java_thread_group->obj_field(_groups_offset);
1461 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1462 return objArrayOop(groups);
1463 }
1464
1465 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1466 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1467 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1468 }
1469
1470 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1471 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1472 return java_thread_group->bool_field(_destroyed_offset) != 0;
1473 }
1474
1475 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1476 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1477 return java_thread_group->bool_field(_daemon_offset) != 0;
1478 }
1479
1480 void java_lang_ThreadGroup::compute_offsets() {
1481 assert(_parent_offset == 0, "offsets should be initialized only once");
1482
1483 InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1484
1485 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature());
1486 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
1487 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature());
1488 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature());
1489 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1490 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature());
1491 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature());
1492 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature());
1493 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature());
1494 }
1495
1496
1497 void java_lang_Throwable::compute_offsets() {
1498 InstanceKlass* k = SystemDictionary::Throwable_klass();
1499 compute_offset(backtrace_offset, k, "backtrace", vmSymbols::object_signature());
1500 compute_offset(detailMessage_offset, k, "detailMessage", vmSymbols::string_signature());
1501 compute_offset(stackTrace_offset, k, "stackTrace", vmSymbols::java_lang_StackTraceElement_array());
1502 compute_offset(depth_offset, k, "depth", vmSymbols::int_signature());
1503 compute_offset(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", vmSymbols::java_lang_StackTraceElement_array(),
1504 /*is_static*/true);
1505 }
1506
1507 oop java_lang_Throwable::unassigned_stacktrace() {
1508 InstanceKlass* ik = SystemDictionary::Throwable_klass();
1509 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1510 if (UseCompressedOops) {
1511 return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1512 } else {
1513 return oopDesc::load_decode_heap_oop((oop*)addr);
1514 }
1515 }
1516
1517 oop java_lang_Throwable::backtrace(oop throwable) {
1518 return throwable->obj_field_acquire(backtrace_offset);
1519 }
1520
1521
1522 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1523 throwable->release_obj_field_put(backtrace_offset, value);
1524 }
1525
1526 int java_lang_Throwable::depth(oop throwable) {
1527 return throwable->int_field(depth_offset);
1528 }
1529
1530 void java_lang_Throwable::set_depth(oop throwable, int value) {
1531 throwable->int_field_put(depth_offset, value);
1532 }
1533
1534 oop java_lang_Throwable::message(oop throwable) {
1535 return throwable->obj_field(detailMessage_offset);
1536 }
1537
1538
1539 // Return Symbol for detailed_message or NULL
1540 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1541 PRESERVE_EXCEPTION_MARK; // Keep original exception
1542 oop detailed_message = java_lang_Throwable::message(throwable);
1543 if (detailed_message != NULL) {
1544 return java_lang_String::as_symbol(detailed_message, THREAD);
1545 }
1546 return NULL;
1547 }
1548
1549 void java_lang_Throwable::set_message(oop throwable, oop value) {
1550 throwable->obj_field_put(detailMessage_offset, value);
1551 }
1552
1553
1554 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1555 throwable->obj_field_put(stackTrace_offset, st_element_array);
1556 }
1557
1558 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1559 set_stacktrace(throwable, NULL);
1560 }
1561
1562
1563 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1564 ResourceMark rm;
1565 Klass* k = throwable->klass();
1566 assert(k != NULL, "just checking");
1567 st->print("%s", k->external_name());
1568 oop msg = message(throwable);
1569 if (msg != NULL) {
1570 st->print(": %s", java_lang_String::as_utf8_string(msg));
1571 }
1572 }
1573
1574 // After this many redefines, the stack trace is unreliable.
1575 const int MAX_VERSION = USHRT_MAX;
1576
1577 static inline bool version_matches(Method* method, int version) {
1578 assert(version < MAX_VERSION, "version is too big");
1579 return method != NULL && (method->constants()->version() == version);
1580 }
1581
1582
1583 // This class provides a simple wrapper over the internal structure of
1584 // exception backtrace to insulate users of the backtrace from needing
1585 // to know what it looks like.
1586 class BacktraceBuilder: public StackObj {
1587 friend class BacktraceIterator;
1588 private:
1589 Handle _backtrace;
1590 objArrayOop _head;
1591 typeArrayOop _methods;
1592 typeArrayOop _bcis;
1593 objArrayOop _mirrors;
1594 typeArrayOop _names; // needed to insulate method name against redefinition
1595 int _index;
1596 NoSafepointVerifier _nsv;
1597
1598 enum {
1599 trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1600 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset,
1601 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1602 trace_names_offset = java_lang_Throwable::trace_names_offset,
1603 trace_next_offset = java_lang_Throwable::trace_next_offset,
1604 trace_size = java_lang_Throwable::trace_size,
1605 trace_chunk_size = java_lang_Throwable::trace_chunk_size
1606 };
1607
1608 // get info out of chunks
1609 static typeArrayOop get_methods(objArrayHandle chunk) {
1610 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1611 assert(methods != NULL, "method array should be initialized in backtrace");
1612 return methods;
1613 }
1614 static typeArrayOop get_bcis(objArrayHandle chunk) {
1615 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1616 assert(bcis != NULL, "bci array should be initialized in backtrace");
1617 return bcis;
1618 }
1619 static objArrayOop get_mirrors(objArrayHandle chunk) {
1620 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1621 assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1622 return mirrors;
1623 }
1624 static typeArrayOop get_names(objArrayHandle chunk) {
1625 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1626 assert(names != NULL, "names array should be initialized in backtrace");
1627 return names;
1628 }
1629
1630 public:
1631
1632 // constructor for new backtrace
1633 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) {
1634 expand(CHECK);
1635 _backtrace = Handle(THREAD, _head);
1636 _index = 0;
1637 }
1638
1639 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1640 _methods = get_methods(backtrace);
1641 _bcis = get_bcis(backtrace);
1642 _mirrors = get_mirrors(backtrace);
1643 _names = get_names(backtrace);
1644 assert(_methods->length() == _bcis->length() &&
1645 _methods->length() == _mirrors->length() &&
1646 _mirrors->length() == _names->length(),
1647 "method and source information arrays should match");
1648
1649 // head is the preallocated backtrace
1650 _head = backtrace();
1651 _backtrace = Handle(thread, _head);
1652 _index = 0;
1653 }
1654
1655 void expand(TRAPS) {
1656 objArrayHandle old_head(THREAD, _head);
1657 PauseNoSafepointVerifier pnsv(&_nsv);
1658
1659 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1660 objArrayHandle new_head(THREAD, head);
1661
1662 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1663 typeArrayHandle new_methods(THREAD, methods);
1664
1665 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1666 typeArrayHandle new_bcis(THREAD, bcis);
1667
1668 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1669 objArrayHandle new_mirrors(THREAD, mirrors);
1670
1671 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
1672 typeArrayHandle new_names(THREAD, names);
1673
1674 if (!old_head.is_null()) {
1675 old_head->obj_at_put(trace_next_offset, new_head());
1676 }
1677 new_head->obj_at_put(trace_methods_offset, new_methods());
1678 new_head->obj_at_put(trace_bcis_offset, new_bcis());
1679 new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1680 new_head->obj_at_put(trace_names_offset, new_names());
1681
1682 _head = new_head();
1683 _methods = new_methods();
1684 _bcis = new_bcis();
1685 _mirrors = new_mirrors();
1686 _names = new_names();
1687 _index = 0;
1688 }
1689
1690 oop backtrace() {
1691 return _backtrace();
1692 }
1693
1694 inline void push(Method* method, int bci, TRAPS) {
1695 // Smear the -1 bci to 0 since the array only holds unsigned
1696 // shorts. The later line number lookup would just smear the -1
1697 // to a 0 even if it could be recorded.
1698 if (bci == SynchronizationEntryBCI) bci = 0;
1699
1700 if (_index >= trace_chunk_size) {
1701 methodHandle mhandle(THREAD, method);
1702 expand(CHECK);
1703 method = mhandle();
1704 }
1705
1706 _methods->ushort_at_put(_index, method->orig_method_idnum());
1707 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
1708
1709 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
1710 // klass owning the symbols alive so their refcounts aren't decremented.
1711 Symbol* name = method->name();
1712 _names->symbol_at_put(_index, name);
1713
1714 // We need to save the mirrors in the backtrace to keep the class
1715 // from being unloaded while we still have this stack trace.
1716 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1717 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1718 _index++;
1719 }
1720
1721 };
1722
1723 struct BacktraceElement : public StackObj {
1724 int _method_id;
1725 int _bci;
1726 int _version;
1727 Symbol* _name;
1728 Handle _mirror;
1729 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
1730 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {}
1731 };
1732
1733 class BacktraceIterator : public StackObj {
1734 int _index;
1735 objArrayHandle _result;
1736 objArrayHandle _mirrors;
1737 typeArrayHandle _methods;
1738 typeArrayHandle _bcis;
1739 typeArrayHandle _names;
1740
1741 void init(objArrayHandle result, Thread* thread) {
1742 // Get method id, bci, version and mirror from chunk
1743 _result = result;
1744 if (_result.not_null()) {
1745 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
1746 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
1747 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
1748 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
1749 _index = 0;
1750 }
1751 }
1752 public:
1753 BacktraceIterator(objArrayHandle result, Thread* thread) {
1754 init(result, thread);
1755 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
1756 }
1757
1758 BacktraceElement next(Thread* thread) {
1759 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
1760 _methods->ushort_at(_index),
1761 Backtrace::version_at(_bcis->int_at(_index)),
1762 Backtrace::bci_at(_bcis->int_at(_index)),
1763 _names->symbol_at(_index));
1764 _index++;
1765
1766 if (_index >= java_lang_Throwable::trace_chunk_size) {
1767 int next_offset = java_lang_Throwable::trace_next_offset;
1768 // Get next chunk
1769 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
1770 init(result, thread);
1771 }
1772 return e;
1773 }
1774
1775 bool repeat() {
1776 return _result.not_null() && _mirrors->obj_at(_index) != NULL;
1777 }
1778 };
1779
1780
1781 // Print stack trace element to resource allocated buffer
1782 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
1783 int version, int bci, Symbol* name) {
1784 ResourceMark rm;
1785
1786 // Get strings and string lengths
1787 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1788 const char* klass_name = holder->external_name();
1789 int buf_len = (int)strlen(klass_name);
1790
1791 char* method_name = name->as_C_string();
1792 buf_len += (int)strlen(method_name);
1793
1794 char* source_file_name = NULL;
1795 Symbol* source = Backtrace::get_source_file_name(holder, version);
1796 if (source != NULL) {
1797 source_file_name = source->as_C_string();
1798 buf_len += (int)strlen(source_file_name);
1799 }
1800
1801 char *module_name = NULL, *module_version = NULL;
1802 ModuleEntry* module = holder->module();
1803 if (module->is_named()) {
1804 module_name = module->name()->as_C_string();
1805 buf_len += (int)strlen(module_name);
1806 if (module->version() != NULL) {
1807 module_version = module->version()->as_C_string();
1808 buf_len += (int)strlen(module_version);
1809 }
1810 }
1811
1812 // Allocate temporary buffer with extra space for formatting and line number
1813 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1814
1815 // Print stack trace line in buffer
1816 sprintf(buf, "\tat %s.%s(", klass_name, method_name);
1817
1818 // Print module information
1819 if (module_name != NULL) {
1820 if (module_version != NULL) {
1821 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
1822 } else {
1823 sprintf(buf + (int)strlen(buf), "%s/", module_name);
1824 }
1825 }
1826
1827 // The method can be NULL if the requested class version is gone
1828 Method* method = holder->method_with_orig_idnum(method_id, version);
1829 if (!version_matches(method, version)) {
1830 strcat(buf, "Redefined)");
1831 } else {
1832 int line_number = Backtrace::get_line_number(method, bci);
1833 if (line_number == -2) {
1834 strcat(buf, "Native Method)");
1835 } else {
1836 if (source_file_name != NULL && (line_number != -1)) {
1837 // Sourcename and linenumber
1838 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
1839 } else if (source_file_name != NULL) {
1840 // Just sourcename
1841 sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
1842 } else {
1843 // Neither sourcename nor linenumber
1844 sprintf(buf + (int)strlen(buf), "Unknown Source)");
1845 }
1846 CompiledMethod* nm = method->code();
1847 if (WizardMode && nm != NULL) {
1848 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1849 }
1850 }
1851 }
1852
1853 st->print_cr("%s", buf);
1854 }
1855
1856 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
1857 Handle mirror (Thread::current(), method->method_holder()->java_mirror());
1858 int method_id = method->orig_method_idnum();
1859 int version = method->constants()->version();
1860 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
1861 }
1862
1863 /**
1864 * Print the throwable message and its stack trace plus all causes by walking the
1865 * cause chain. The output looks the same as of Throwable.printStackTrace().
1866 */
1867 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
1868 // First, print the message.
1869 print(throwable(), st);
1870 st->cr();
1871
1872 // Now print the stack trace.
1873 Thread* THREAD = Thread::current();
1874 while (throwable.not_null()) {
1875 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
1876 if (result.is_null()) {
1877 st->print_raw_cr("\t<<no stack trace available>>");
1878 return;
1879 }
1880 BacktraceIterator iter(result, THREAD);
1881
1882 while (iter.repeat()) {
1883 BacktraceElement bte = iter.next(THREAD);
1884 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
1885 }
1886 {
1887 // Call getCause() which doesn't necessarily return the _cause field.
1888 EXCEPTION_MARK;
1889 JavaValue cause(T_OBJECT);
1890 JavaCalls::call_virtual(&cause,
1891 throwable,
1892 throwable->klass(),
1893 vmSymbols::getCause_name(),
1894 vmSymbols::void_throwable_signature(),
1895 THREAD);
1896 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1897 if (HAS_PENDING_EXCEPTION) {
1898 CLEAR_PENDING_EXCEPTION;
1899 throwable = Handle();
1900 } else {
1901 throwable = Handle(THREAD, (oop) cause.get_jobject());
1902 if (throwable.not_null()) {
1903 st->print("Caused by: ");
1904 print(throwable(), st);
1905 st->cr();
1906 }
1907 }
1908 }
1909 }
1910 }
1911
1912 /**
1913 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
1914 */
1915 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
1916 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
1917 JavaValue result(T_VOID);
1918 JavaCalls::call_virtual(&result,
1919 throwable,
1920 SystemDictionary::Throwable_klass(),
1921 vmSymbols::printStackTrace_name(),
1922 vmSymbols::void_method_signature(),
1923 THREAD);
1924 }
1925
1926 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
1927 if (!StackTraceInThrowable) return;
1928 ResourceMark rm(THREAD);
1929
1930 // Start out by clearing the backtrace for this object, in case the VM
1931 // runs out of memory while allocating the stack trace
1932 set_backtrace(throwable(), NULL);
1933 // Clear lazily constructed Java level stacktrace if refilling occurs
1934 // This is unnecessary in 1.7+ but harmless
1935 clear_stacktrace(throwable());
1936
1937 int max_depth = MaxJavaStackTraceDepth;
1938 JavaThread* thread = (JavaThread*)THREAD;
1939
1940 BacktraceBuilder bt(CHECK);
1941
1942 // If there is no Java frame just return the method that was being called
1943 // with bci 0
1944 if (!thread->has_last_Java_frame()) {
1945 if (max_depth >= 1 && method() != NULL) {
1946 bt.push(method(), 0, CHECK);
1947 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
1948 set_depth(throwable(), 1);
1949 set_backtrace(throwable(), bt.backtrace());
1950 }
1951 return;
1952 }
1953
1954 // Instead of using vframe directly, this version of fill_in_stack_trace
1955 // basically handles everything by hand. This significantly improved the
1956 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1957 // See bug 6333838 for more details.
1958 // The "ASSERT" here is to verify this method generates the exactly same stack
1959 // trace as utilizing vframe.
1960 #ifdef ASSERT
1961 vframeStream st(thread);
1962 methodHandle st_method(THREAD, st.method());
1963 #endif
1964 int total_count = 0;
1965 RegisterMap map(thread, false);
1966 int decode_offset = 0;
1967 CompiledMethod* nm = NULL;
1968 bool skip_fillInStackTrace_check = false;
1969 bool skip_throwableInit_check = false;
1970 bool skip_hidden = !ShowHiddenFrames;
1971
1972 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
1973 Method* method = NULL;
1974 int bci = 0;
1975
1976 // Compiled java method case.
1977 if (decode_offset != 0) {
1978 DebugInfoReadStream stream(nm, decode_offset);
1979 decode_offset = stream.read_int();
1980 method = (Method*)nm->metadata_at(stream.read_int());
1981 bci = stream.read_bci();
1982 } else {
1983 if (fr.is_first_frame()) break;
1984 address pc = fr.pc();
1985 if (fr.is_interpreted_frame()) {
1986 address bcp = fr.interpreter_frame_bcp();
1987 method = fr.interpreter_frame_method();
1988 bci = method->bci_from(bcp);
1989 fr = fr.sender(&map);
1990 } else {
1991 CodeBlob* cb = fr.cb();
1992 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1993 // but non nmethod
1994 fr = fr.sender(&map);
1995 if (cb == NULL || !cb->is_compiled()) {
1996 continue;
1997 }
1998 nm = cb->as_compiled_method();
1999 if (nm->method()->is_native()) {
2000 method = nm->method();
2001 bci = 0;
2002 } else {
2003 PcDesc* pd = nm->pc_desc_at(pc);
2004 decode_offset = pd->scope_decode_offset();
2005 // if decode_offset is not equal to 0, it will execute the
2006 // "compiled java method case" at the beginning of the loop.
2007 continue;
2008 }
2009 }
2010 }
2011 #ifdef ASSERT
2012 assert(st_method() == method && st.bci() == bci,
2013 "Wrong stack trace");
2014 st.next();
2015 // vframeStream::method isn't GC-safe so store off a copy
2016 // of the Method* in case we GC.
2017 if (!st.at_end()) {
2018 st_method = st.method();
2019 }
2020 #endif
2021
2022 // the format of the stacktrace will be:
2023 // - 1 or more fillInStackTrace frames for the exception class (skipped)
2024 // - 0 or more <init> methods for the exception class (skipped)
2025 // - rest of the stack
2026
2027 if (!skip_fillInStackTrace_check) {
2028 if (method->name() == vmSymbols::fillInStackTrace_name() &&
2029 throwable->is_a(method->method_holder())) {
2030 continue;
2031 }
2032 else {
2033 skip_fillInStackTrace_check = true; // gone past them all
2034 }
2035 }
2036 if (!skip_throwableInit_check) {
2037 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2038
2039 // skip <init> methods of the exception class and superclasses
2040 // This is simlar to classic VM.
2041 if (method->name() == vmSymbols::object_initializer_name() &&
2042 throwable->is_a(method->method_holder())) {
2043 continue;
2044 } else {
2045 // there are none or we've seen them all - either way stop checking
2046 skip_throwableInit_check = true;
2047 }
2048 }
2049 if (method->is_hidden()) {
2050 if (skip_hidden) continue;
2051 }
2052 bt.push(method, bci, CHECK);
2053 total_count++;
2054 }
2055
2056 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2057
2058 // Put completed stack trace into throwable object
2059 set_backtrace(throwable(), bt.backtrace());
2060 set_depth(throwable(), total_count);
2061 }
2062
2063 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2064 // No-op if stack trace is disabled
2065 if (!StackTraceInThrowable) {
2066 return;
2067 }
2068
2069 // Disable stack traces for some preallocated out of memory errors
2070 if (!Universe::should_fill_in_stack_trace(throwable)) {
2071 return;
2072 }
2073
2074 PRESERVE_EXCEPTION_MARK;
2075
2076 JavaThread* thread = JavaThread::active();
2077 fill_in_stack_trace(throwable, method, thread);
2078 // ignore exceptions thrown during stack trace filling
2079 CLEAR_PENDING_EXCEPTION;
2080 }
2081
2082 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2083 // Allocate stack trace - backtrace is created but not filled in
2084
2085 // No-op if stack trace is disabled
2086 if (!StackTraceInThrowable) return;
2087 BacktraceBuilder bt(CHECK); // creates a backtrace
2088 set_backtrace(throwable(), bt.backtrace());
2089 }
2090
2091
2092 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2093 // Fill in stack trace into preallocated backtrace (no GC)
2094
2095 // No-op if stack trace is disabled
2096 if (!StackTraceInThrowable) return;
2097
2098 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2099
2100 JavaThread* THREAD = JavaThread::current();
2101
2102 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2103 assert(backtrace.not_null(), "backtrace should have been preallocated");
2104
2105 ResourceMark rm(THREAD);
2106 vframeStream st(THREAD);
2107
2108 BacktraceBuilder bt(THREAD, backtrace);
2109
2110 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2111 // methods as preallocated errors aren't created by "java" code.
2112
2113 // fill in as much stack trace as possible
2114 int chunk_count = 0;
2115 for (;!st.at_end(); st.next()) {
2116 bt.push(st.method(), st.bci(), CHECK);
2117 chunk_count++;
2118
2119 // Bail-out for deep stacks
2120 if (chunk_count >= trace_chunk_size) break;
2121 }
2122 set_depth(throwable(), chunk_count);
2123 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2124
2125 // We support the Throwable immutability protocol defined for Java 7.
2126 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2127 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2128 }
2129
2130 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2131 objArrayHandle stack_trace_array_h, TRAPS) {
2132
2133 if (throwable.is_null() || stack_trace_array_h.is_null()) {
2134 THROW(vmSymbols::java_lang_NullPointerException());
2135 }
2136
2137 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2138
2139 if (stack_trace_array_h->length() != depth(throwable())) {
2140 THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2141 }
2142
2143 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2144 BacktraceIterator iter(result, THREAD);
2145
2146 int index = 0;
2147 while (iter.repeat()) {
2148 BacktraceElement bte = iter.next(THREAD);
2149
2150 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2151
2152 if (stack_trace_element.is_null()) {
2153 THROW(vmSymbols::java_lang_NullPointerException());
2154 }
2155
2156 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2157 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2158
2159 java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2160 method,
2161 bte._version,
2162 bte._bci,
2163 bte._name, CHECK);
2164 }
2165 }
2166
2167 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2168 // Allocate java.lang.StackTraceElement instance
2169 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2170 assert(k != NULL, "must be loaded in 1.4+");
2171 if (k->should_be_initialized()) {
2172 k->initialize(CHECK_0);
2173 }
2174
2175 Handle element = k->allocate_instance_handle(CHECK_0);
2176
2177 int version = method->constants()->version();
2178 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2179 return element();
2180 }
2181
2182 void java_lang_StackTraceElement::fill_in(Handle element,
2183 InstanceKlass* holder, const methodHandle& method,
2184 int version, int bci, Symbol* name, TRAPS) {
2185 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2186
2187 // Fill in class name
2188 ResourceMark rm(THREAD);
2189 const char* str = holder->external_name();
2190 oop classname = StringTable::intern((char*) str, CHECK);
2191 java_lang_StackTraceElement::set_declaringClass(element(), classname);
2192 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror());
2193
2194 oop loader = holder->class_loader();
2195 if (loader != NULL) {
2196 oop loader_name = java_lang_ClassLoader::name(loader);
2197 if (loader_name != NULL)
2198 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2199 }
2200
2201 // Fill in method name
2202 oop methodname = StringTable::intern(name, CHECK);
2203 java_lang_StackTraceElement::set_methodName(element(), methodname);
2204
2205 // Fill in module name and version
2206 ModuleEntry* module = holder->module();
2207 if (module->is_named()) {
2208 oop module_name = StringTable::intern(module->name(), CHECK);
2209 java_lang_StackTraceElement::set_moduleName(element(), module_name);
2210 oop module_version;
2211 if (module->version() != NULL) {
2212 module_version = StringTable::intern(module->version(), CHECK);
2213 } else {
2214 module_version = NULL;
2215 }
2216 java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2217 }
2218
2219 if (method() == NULL || !version_matches(method(), version)) {
2220 // The method was redefined, accurate line number information isn't available
2221 java_lang_StackTraceElement::set_fileName(element(), NULL);
2222 java_lang_StackTraceElement::set_lineNumber(element(), -1);
2223 } else {
2224 // Fill in source file name and line number.
2225 Symbol* source = Backtrace::get_source_file_name(holder, version);
2226 if (ShowHiddenFrames && source == NULL)
2227 source = vmSymbols::unknown_class_name();
2228 oop filename = StringTable::intern(source, CHECK);
2229 java_lang_StackTraceElement::set_fileName(element(), filename);
2230
2231 int line_number = Backtrace::get_line_number(method, bci);
2232 java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2233 }
2234 }
2235
2236 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2237 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2238 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2239 // we should expand MemberName::name when Throwable uses StackTrace
2240 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2241 return method;
2242 }
2243
2244 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2245 // set Method* or mid/cpref
2246 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2247 InstanceKlass* ik = method->method_holder();
2248 CallInfo info(method(), ik, CHECK);
2249 MethodHandles::init_method_MemberName(mname, info);
2250 // set bci
2251 java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2252 // method may be redefined; store the version
2253 int version = method->constants()->version();
2254 assert((jushort)version == version, "version should be short");
2255 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2256 }
2257
2258 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2259 ResourceMark rm(THREAD);
2260 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2261 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2262 InstanceKlass* holder = InstanceKlass::cast(clazz);
2263 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2264
2265 short version = stackFrame->short_field(_version_offset);
2266 short bci = stackFrame->short_field(_bci_offset);
2267 Symbol* name = method->name();
2268 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2269 }
2270
2271 void java_lang_StackFrameInfo::compute_offsets() {
2272 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2273 compute_offset(_memberName_offset, k, "memberName", vmSymbols::object_signature());
2274 compute_offset(_bci_offset, k, "bci", vmSymbols::short_signature());
2275 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2276 }
2277
2278 void java_lang_LiveStackFrameInfo::compute_offsets() {
2279 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2280 compute_offset(_monitors_offset, k, "monitors", vmSymbols::object_array_signature());
2281 compute_offset(_locals_offset, k, "locals", vmSymbols::object_array_signature());
2282 compute_offset(_operands_offset, k, "operands", vmSymbols::object_array_signature());
2283 compute_offset(_mode_offset, k, "mode", vmSymbols::int_signature());
2284 }
2285
2286 void java_lang_reflect_AccessibleObject::compute_offsets() {
2287 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2288 compute_offset(override_offset, k, "override", vmSymbols::bool_signature());
2289 }
2290
2291 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2292 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2293 return (jboolean) reflect->bool_field(override_offset);
2294 }
2295
2296 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2297 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298 reflect->bool_field_put(override_offset, (int) value);
2299 }
2300
2301 void java_lang_reflect_Method::compute_offsets() {
2302 InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2303 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2304 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2305 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature());
2306 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2307 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2308 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2309 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2310 // The generic signature and annotations fields are only present in 1.5
2311 signature_offset = -1;
2312 annotations_offset = -1;
2313 parameter_annotations_offset = -1;
2314 annotation_default_offset = -1;
2315 type_annotations_offset = -1;
2316 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2317 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2318 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2319 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature());
2320 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2321 }
2322
2323 Handle java_lang_reflect_Method::create(TRAPS) {
2324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2325 Klass* klass = SystemDictionary::reflect_Method_klass();
2326 // This class is eagerly initialized during VM initialization, since we keep a refence
2327 // to one of the methods
2328 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2329 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2330 }
2331
2332 oop java_lang_reflect_Method::clazz(oop reflect) {
2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2334 return reflect->obj_field(clazz_offset);
2335 }
2336
2337 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2339 reflect->obj_field_put(clazz_offset, value);
2340 }
2341
2342 int java_lang_reflect_Method::slot(oop reflect) {
2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344 return reflect->int_field(slot_offset);
2345 }
2346
2347 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2348 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2349 reflect->int_field_put(slot_offset, value);
2350 }
2351
2352 oop java_lang_reflect_Method::name(oop method) {
2353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2354 return method->obj_field(name_offset);
2355 }
2356
2357 void java_lang_reflect_Method::set_name(oop method, oop value) {
2358 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2359 method->obj_field_put(name_offset, value);
2360 }
2361
2362 oop java_lang_reflect_Method::return_type(oop method) {
2363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2364 return method->obj_field(returnType_offset);
2365 }
2366
2367 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2368 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2369 method->obj_field_put(returnType_offset, value);
2370 }
2371
2372 oop java_lang_reflect_Method::parameter_types(oop method) {
2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374 return method->obj_field(parameterTypes_offset);
2375 }
2376
2377 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2379 method->obj_field_put(parameterTypes_offset, value);
2380 }
2381
2382 oop java_lang_reflect_Method::exception_types(oop method) {
2383 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2384 return method->obj_field(exceptionTypes_offset);
2385 }
2386
2387 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2389 method->obj_field_put(exceptionTypes_offset, value);
2390 }
2391
2392 int java_lang_reflect_Method::modifiers(oop method) {
2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2394 return method->int_field(modifiers_offset);
2395 }
2396
2397 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2399 method->int_field_put(modifiers_offset, value);
2400 }
2401
2402 bool java_lang_reflect_Method::has_signature_field() {
2403 return (signature_offset >= 0);
2404 }
2405
2406 oop java_lang_reflect_Method::signature(oop method) {
2407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2408 assert(has_signature_field(), "signature field must be present");
2409 return method->obj_field(signature_offset);
2410 }
2411
2412 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2414 assert(has_signature_field(), "signature field must be present");
2415 method->obj_field_put(signature_offset, value);
2416 }
2417
2418 bool java_lang_reflect_Method::has_annotations_field() {
2419 return (annotations_offset >= 0);
2420 }
2421
2422 oop java_lang_reflect_Method::annotations(oop method) {
2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2424 assert(has_annotations_field(), "annotations field must be present");
2425 return method->obj_field(annotations_offset);
2426 }
2427
2428 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2429 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430 assert(has_annotations_field(), "annotations field must be present");
2431 method->obj_field_put(annotations_offset, value);
2432 }
2433
2434 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2435 return (parameter_annotations_offset >= 0);
2436 }
2437
2438 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2441 return method->obj_field(parameter_annotations_offset);
2442 }
2443
2444 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2446 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2447 method->obj_field_put(parameter_annotations_offset, value);
2448 }
2449
2450 bool java_lang_reflect_Method::has_annotation_default_field() {
2451 return (annotation_default_offset >= 0);
2452 }
2453
2454 oop java_lang_reflect_Method::annotation_default(oop method) {
2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456 assert(has_annotation_default_field(), "annotation default field must be present");
2457 return method->obj_field(annotation_default_offset);
2458 }
2459
2460 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2461 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2462 assert(has_annotation_default_field(), "annotation default field must be present");
2463 method->obj_field_put(annotation_default_offset, value);
2464 }
2465
2466 bool java_lang_reflect_Method::has_type_annotations_field() {
2467 return (type_annotations_offset >= 0);
2468 }
2469
2470 oop java_lang_reflect_Method::type_annotations(oop method) {
2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2472 assert(has_type_annotations_field(), "type_annotations field must be present");
2473 return method->obj_field(type_annotations_offset);
2474 }
2475
2476 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2478 assert(has_type_annotations_field(), "type_annotations field must be present");
2479 method->obj_field_put(type_annotations_offset, value);
2480 }
2481
2482 void java_lang_reflect_Constructor::compute_offsets() {
2483 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2484 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2485 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2486 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2487 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2488 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2489 // The generic signature and annotations fields are only present in 1.5
2490 signature_offset = -1;
2491 annotations_offset = -1;
2492 parameter_annotations_offset = -1;
2493 type_annotations_offset = -1;
2494 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2495 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2496 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2497 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2498 }
2499
2500 Handle java_lang_reflect_Constructor::create(TRAPS) {
2501 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2502 Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2503 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2504 InstanceKlass* ik = InstanceKlass::cast(k);
2505 // Ensure it is initialized
2506 ik->initialize(CHECK_NH);
2507 return ik->allocate_instance_handle(THREAD);
2508 }
2509
2510 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2511 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2512 return reflect->obj_field(clazz_offset);
2513 }
2514
2515 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2516 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2517 reflect->obj_field_put(clazz_offset, value);
2518 }
2519
2520 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2521 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2522 return constructor->obj_field(parameterTypes_offset);
2523 }
2524
2525 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2526 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2527 constructor->obj_field_put(parameterTypes_offset, value);
2528 }
2529
2530 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2531 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2532 return constructor->obj_field(exceptionTypes_offset);
2533 }
2534
2535 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2537 constructor->obj_field_put(exceptionTypes_offset, value);
2538 }
2539
2540 int java_lang_reflect_Constructor::slot(oop reflect) {
2541 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2542 return reflect->int_field(slot_offset);
2543 }
2544
2545 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2546 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2547 reflect->int_field_put(slot_offset, value);
2548 }
2549
2550 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2551 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2552 return constructor->int_field(modifiers_offset);
2553 }
2554
2555 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2556 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2557 constructor->int_field_put(modifiers_offset, value);
2558 }
2559
2560 bool java_lang_reflect_Constructor::has_signature_field() {
2561 return (signature_offset >= 0);
2562 }
2563
2564 oop java_lang_reflect_Constructor::signature(oop constructor) {
2565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2566 assert(has_signature_field(), "signature field must be present");
2567 return constructor->obj_field(signature_offset);
2568 }
2569
2570 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2571 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2572 assert(has_signature_field(), "signature field must be present");
2573 constructor->obj_field_put(signature_offset, value);
2574 }
2575
2576 bool java_lang_reflect_Constructor::has_annotations_field() {
2577 return (annotations_offset >= 0);
2578 }
2579
2580 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2581 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2582 assert(has_annotations_field(), "annotations field must be present");
2583 return constructor->obj_field(annotations_offset);
2584 }
2585
2586 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2587 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2588 assert(has_annotations_field(), "annotations field must be present");
2589 constructor->obj_field_put(annotations_offset, value);
2590 }
2591
2592 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2593 return (parameter_annotations_offset >= 0);
2594 }
2595
2596 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2597 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2598 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2599 return method->obj_field(parameter_annotations_offset);
2600 }
2601
2602 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2603 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2604 assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2605 method->obj_field_put(parameter_annotations_offset, value);
2606 }
2607
2608 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2609 return (type_annotations_offset >= 0);
2610 }
2611
2612 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2613 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2614 assert(has_type_annotations_field(), "type_annotations field must be present");
2615 return constructor->obj_field(type_annotations_offset);
2616 }
2617
2618 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2620 assert(has_type_annotations_field(), "type_annotations field must be present");
2621 constructor->obj_field_put(type_annotations_offset, value);
2622 }
2623
2624 void java_lang_reflect_Field::compute_offsets() {
2625 InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2626 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
2627 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2628 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature());
2629 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature());
2630 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2631 // The generic signature and annotations fields are only present in 1.5
2632 signature_offset = -1;
2633 annotations_offset = -1;
2634 type_annotations_offset = -1;
2635 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2636 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature());
2637 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature());
2638 }
2639
2640 Handle java_lang_reflect_Field::create(TRAPS) {
2641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2642 Symbol* name = vmSymbols::java_lang_reflect_Field();
2643 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2644 InstanceKlass* ik = InstanceKlass::cast(k);
2645 // Ensure it is initialized
2646 ik->initialize(CHECK_NH);
2647 return ik->allocate_instance_handle(THREAD);
2648 }
2649
2650 oop java_lang_reflect_Field::clazz(oop reflect) {
2651 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2652 return reflect->obj_field(clazz_offset);
2653 }
2654
2655 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2656 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2657 reflect->obj_field_put(clazz_offset, value);
2658 }
2659
2660 oop java_lang_reflect_Field::name(oop field) {
2661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2662 return field->obj_field(name_offset);
2663 }
2664
2665 void java_lang_reflect_Field::set_name(oop field, oop value) {
2666 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2667 field->obj_field_put(name_offset, value);
2668 }
2669
2670 oop java_lang_reflect_Field::type(oop field) {
2671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2672 return field->obj_field(type_offset);
2673 }
2674
2675 void java_lang_reflect_Field::set_type(oop field, oop value) {
2676 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2677 field->obj_field_put(type_offset, value);
2678 }
2679
2680 int java_lang_reflect_Field::slot(oop reflect) {
2681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2682 return reflect->int_field(slot_offset);
2683 }
2684
2685 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2687 reflect->int_field_put(slot_offset, value);
2688 }
2689
2690 int java_lang_reflect_Field::modifiers(oop field) {
2691 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2692 return field->int_field(modifiers_offset);
2693 }
2694
2695 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2696 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2697 field->int_field_put(modifiers_offset, value);
2698 }
2699
2700 bool java_lang_reflect_Field::has_signature_field() {
2701 return (signature_offset >= 0);
2702 }
2703
2704 oop java_lang_reflect_Field::signature(oop field) {
2705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2706 assert(has_signature_field(), "signature field must be present");
2707 return field->obj_field(signature_offset);
2708 }
2709
2710 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2711 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2712 assert(has_signature_field(), "signature field must be present");
2713 field->obj_field_put(signature_offset, value);
2714 }
2715
2716 bool java_lang_reflect_Field::has_annotations_field() {
2717 return (annotations_offset >= 0);
2718 }
2719
2720 oop java_lang_reflect_Field::annotations(oop field) {
2721 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2722 assert(has_annotations_field(), "annotations field must be present");
2723 return field->obj_field(annotations_offset);
2724 }
2725
2726 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2728 assert(has_annotations_field(), "annotations field must be present");
2729 field->obj_field_put(annotations_offset, value);
2730 }
2731
2732 bool java_lang_reflect_Field::has_type_annotations_field() {
2733 return (type_annotations_offset >= 0);
2734 }
2735
2736 oop java_lang_reflect_Field::type_annotations(oop field) {
2737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2738 assert(has_type_annotations_field(), "type_annotations field must be present");
2739 return field->obj_field(type_annotations_offset);
2740 }
2741
2742 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2744 assert(has_type_annotations_field(), "type_annotations field must be present");
2745 field->obj_field_put(type_annotations_offset, value);
2746 }
2747
2748 void reflect_ConstantPool::compute_offsets() {
2749 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2750 // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2751 compute_offset(_oop_offset, k, "constantPoolOop", vmSymbols::object_signature());
2752 }
2753
2754 void java_lang_reflect_Parameter::compute_offsets() {
2755 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
2756 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2757 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2758 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature());
2759 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature());
2760 }
2761
2762 Handle java_lang_reflect_Parameter::create(TRAPS) {
2763 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2764 Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2765 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2766 InstanceKlass* ik = InstanceKlass::cast(k);
2767 // Ensure it is initialized
2768 ik->initialize(CHECK_NH);
2769 return ik->allocate_instance_handle(THREAD);
2770 }
2771
2772 oop java_lang_reflect_Parameter::name(oop param) {
2773 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2774 return param->obj_field(name_offset);
2775 }
2776
2777 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2779 param->obj_field_put(name_offset, value);
2780 }
2781
2782 int java_lang_reflect_Parameter::modifiers(oop param) {
2783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2784 return param->int_field(modifiers_offset);
2785 }
2786
2787 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2788 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2789 param->int_field_put(modifiers_offset, value);
2790 }
2791
2792 int java_lang_reflect_Parameter::index(oop param) {
2793 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2794 return param->int_field(index_offset);
2795 }
2796
2797 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2798 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2799 param->int_field_put(index_offset, value);
2800 }
2801
2802 oop java_lang_reflect_Parameter::executable(oop param) {
2803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2804 return param->obj_field(executable_offset);
2805 }
2806
2807 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2808 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2809 param->obj_field_put(executable_offset, value);
2810 }
2811
2812
2813 int java_lang_Module::loader_offset;
2814 int java_lang_Module::name_offset;
2815 int java_lang_Module::_module_entry_offset = -1;
2816
2817 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
2818 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2819
2820 Symbol* name = vmSymbols::java_lang_Module();
2821 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2822 InstanceKlass* ik = InstanceKlass::cast(k);
2823 Handle jlmh = ik->allocate_instance_handle(CHECK_NH);
2824 JavaValue result(T_VOID);
2825 JavaCalls::call_special(&result, jlmh, ik,
2826 vmSymbols::object_initializer_name(),
2827 vmSymbols::java_lang_module_init_signature(),
2828 loader, module_name, CHECK_NH);
2829 return jlmh;
2830 }
2831
2832 void java_lang_Module::compute_offsets() {
2833 InstanceKlass* k = SystemDictionary::Module_klass();
2834 compute_offset(loader_offset, k, vmSymbols::loader_name(), vmSymbols::classloader_signature());
2835 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
2836 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2837 }
2838
2839
2840 oop java_lang_Module::loader(oop module) {
2841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2842 return module->obj_field(loader_offset);
2843 }
2844
2845 void java_lang_Module::set_loader(oop module, oop value) {
2846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2847 module->obj_field_put(loader_offset, value);
2848 }
2849
2850 oop java_lang_Module::name(oop module) {
2851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2852 return module->obj_field(name_offset);
2853 }
2854
2855 void java_lang_Module::set_name(oop module, oop value) {
2856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2857 module->obj_field_put(name_offset, value);
2858 }
2859
2860 ModuleEntry* java_lang_Module::module_entry(oop module, TRAPS) {
2861 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2862 assert(module != NULL, "module can't be null");
2863 assert(oopDesc::is_oop(module), "module must be oop");
2864
2865 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
2866 if (module_entry == NULL) {
2867 // If the inject field containing the ModuleEntry* is null then return the
2868 // class loader's unnamed module.
2869 oop loader = java_lang_Module::loader(module);
2870 Handle h_loader = Handle(THREAD, loader);
2871 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader, CHECK_NULL);
2872 return loader_cld->unnamed_module();
2873 }
2874 return module_entry;
2875 }
2876
2877 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
2878 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
2879 assert(module != NULL, "module can't be null");
2880 assert(oopDesc::is_oop(module), "module must be oop");
2881 module->address_field_put(_module_entry_offset, (address)module_entry);
2882 }
2883
2884 Handle reflect_ConstantPool::create(TRAPS) {
2885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2886 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
2887 // Ensure it is initialized
2888 k->initialize(CHECK_NH);
2889 return k->allocate_instance_handle(THREAD);
2890 }
2891
2892
2893 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2895 oop mirror = value->pool_holder()->java_mirror();
2896 // Save the mirror to get back the constant pool.
2897 reflect->obj_field_put(_oop_offset, mirror);
2898 }
2899
2900 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
2901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902
2903 oop mirror = reflect->obj_field(_oop_offset);
2904 Klass* k = java_lang_Class::as_Klass(mirror);
2905 assert(k->is_instance_klass(), "Must be");
2906
2907 // Get the constant pool back from the klass. Since class redefinition
2908 // merges the new constant pool into the old, this is essentially the
2909 // same constant pool as the original. If constant pool merging is
2910 // no longer done in the future, this will have to change to save
2911 // the original.
2912 return InstanceKlass::cast(k)->constants();
2913 }
2914
2915 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2916 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2917 compute_offset(_base_offset, k, "base", vmSymbols::object_signature());
2918 }
2919
2920 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2921 Klass* k = SystemDictionary::box_klass(type);
2922 if (k == NULL) return NULL;
2923 InstanceKlass* ik = InstanceKlass::cast(k);
2924 if (!ik->is_initialized()) ik->initialize(CHECK_0);
2925 return ik->allocate_instance(THREAD);
2926 }
2927
2928
2929 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2930 oop box = initialize_and_allocate(type, CHECK_0);
2931 if (box == NULL) return NULL;
2932 switch (type) {
2933 case T_BOOLEAN:
2934 box->bool_field_put(value_offset, value->z);
2935 break;
2936 case T_CHAR:
2937 box->char_field_put(value_offset, value->c);
2938 break;
2939 case T_FLOAT:
2940 box->float_field_put(value_offset, value->f);
2941 break;
2942 case T_DOUBLE:
2943 box->double_field_put(long_value_offset, value->d);
2944 break;
2945 case T_BYTE:
2946 box->byte_field_put(value_offset, value->b);
2947 break;
2948 case T_SHORT:
2949 box->short_field_put(value_offset, value->s);
2950 break;
2951 case T_INT:
2952 box->int_field_put(value_offset, value->i);
2953 break;
2954 case T_LONG:
2955 box->long_field_put(long_value_offset, value->j);
2956 break;
2957 default:
2958 return NULL;
2959 }
2960 return box;
2961 }
2962
2963
2964 BasicType java_lang_boxing_object::basic_type(oop box) {
2965 if (box == NULL) return T_ILLEGAL;
2966 BasicType type = SystemDictionary::box_klass_type(box->klass());
2967 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt
2968 return T_ILLEGAL;
2969 return type;
2970 }
2971
2972
2973 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2974 BasicType type = SystemDictionary::box_klass_type(box->klass());
2975 switch (type) {
2976 case T_BOOLEAN:
2977 value->z = box->bool_field(value_offset);
2978 break;
2979 case T_CHAR:
2980 value->c = box->char_field(value_offset);
2981 break;
2982 case T_FLOAT:
2983 value->f = box->float_field(value_offset);
2984 break;
2985 case T_DOUBLE:
2986 value->d = box->double_field(long_value_offset);
2987 break;
2988 case T_BYTE:
2989 value->b = box->byte_field(value_offset);
2990 break;
2991 case T_SHORT:
2992 value->s = box->short_field(value_offset);
2993 break;
2994 case T_INT:
2995 value->i = box->int_field(value_offset);
2996 break;
2997 case T_LONG:
2998 value->j = box->long_field(long_value_offset);
2999 break;
3000 default:
3001 return T_ILLEGAL;
3002 } // end switch
3003 return type;
3004 }
3005
3006
3007 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3008 BasicType type = SystemDictionary::box_klass_type(box->klass());
3009 switch (type) {
3010 case T_BOOLEAN:
3011 box->bool_field_put(value_offset, value->z);
3012 break;
3013 case T_CHAR:
3014 box->char_field_put(value_offset, value->c);
3015 break;
3016 case T_FLOAT:
3017 box->float_field_put(value_offset, value->f);
3018 break;
3019 case T_DOUBLE:
3020 box->double_field_put(long_value_offset, value->d);
3021 break;
3022 case T_BYTE:
3023 box->byte_field_put(value_offset, value->b);
3024 break;
3025 case T_SHORT:
3026 box->short_field_put(value_offset, value->s);
3027 break;
3028 case T_INT:
3029 box->int_field_put(value_offset, value->i);
3030 break;
3031 case T_LONG:
3032 box->long_field_put(long_value_offset, value->j);
3033 break;
3034 default:
3035 return T_ILLEGAL;
3036 } // end switch
3037 return type;
3038 }
3039
3040
3041 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3042 switch (type) {
3043 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break;
3044 case T_CHAR: st->print("%d", value->c); break;
3045 case T_BYTE: st->print("%d", value->b); break;
3046 case T_SHORT: st->print("%d", value->s); break;
3047 case T_INT: st->print("%d", value->i); break;
3048 case T_LONG: st->print(JLONG_FORMAT, value->j); break;
3049 case T_FLOAT: st->print("%f", value->f); break;
3050 case T_DOUBLE: st->print("%lf", value->d); break;
3051 default: st->print("type %d?", type); break;
3052 }
3053 }
3054
3055 // Support for java_lang_ref_Reference
3056
3057 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3058 assert(!oopDesc::is_null(obj), "sanity");
3059 if (offset != java_lang_ref_Reference::referent_offset) {
3060 return false;
3061 }
3062
3063 Klass* k = obj->klass();
3064 if (!k->is_instance_klass()) {
3065 return false;
3066 }
3067
3068 InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3069 bool is_reference = ik->reference_type() != REF_NONE;
3070 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3071 return is_reference;
3072 }
3073
3074 // Support for java_lang_ref_SoftReference
3075 //
3076
3077 void java_lang_ref_SoftReference::compute_offsets() {
3078 InstanceKlass* k = SystemDictionary::SoftReference_klass();
3079 compute_offset(timestamp_offset, k, "timestamp", vmSymbols::long_signature());
3080 compute_offset(static_clock_offset, k, "clock", vmSymbols::long_signature(), true);
3081 }
3082
3083 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3084 return ref->long_field(timestamp_offset);
3085 }
3086
3087 jlong java_lang_ref_SoftReference::clock() {
3088 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3089 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3090 return *offset;
3091 }
3092
3093 void java_lang_ref_SoftReference::set_clock(jlong value) {
3094 InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3095 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
3096 *offset = value;
3097 }
3098
3099 // Support for java_lang_invoke_DirectMethodHandle
3100
3101 int java_lang_invoke_DirectMethodHandle::_member_offset;
3102
3103 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3104 oop member_name = NULL;
3105 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3106 "a DirectMethodHandle oop is expected");
3107 return dmh->obj_field(member_offset_in_bytes());
3108 }
3109
3110 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3111 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3112 compute_offset(_member_offset, k, "member", vmSymbols::java_lang_invoke_MemberName_signature());
3113 }
3114
3115 // Support for java_lang_invoke_MethodHandle
3116
3117 int java_lang_invoke_MethodHandle::_type_offset;
3118 int java_lang_invoke_MethodHandle::_form_offset;
3119
3120 int java_lang_invoke_MemberName::_clazz_offset;
3121 int java_lang_invoke_MemberName::_name_offset;
3122 int java_lang_invoke_MemberName::_type_offset;
3123 int java_lang_invoke_MemberName::_flags_offset;
3124 int java_lang_invoke_MemberName::_method_offset;
3125 int java_lang_invoke_MemberName::_vmindex_offset;
3126
3127 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3128 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3129
3130 int java_lang_invoke_LambdaForm::_vmentry_offset;
3131
3132 void java_lang_invoke_MethodHandle::compute_offsets() {
3133 InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3134 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
3135 compute_offset(_form_offset, k, "form", vmSymbols::java_lang_invoke_LambdaForm_signature());
3136 }
3137
3138 void java_lang_invoke_MemberName::compute_offsets() {
3139 InstanceKlass* k = SystemDictionary::MemberName_klass();
3140 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature());
3141 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature());
3142 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature());
3143 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature());
3144 compute_offset(_method_offset, k, vmSymbols::method_name(), vmSymbols::java_lang_invoke_ResolvedMethodName_signature());
3145 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3146 }
3147
3148 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3149 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3150 assert(k != NULL, "jdk mismatch");
3151 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3152 }
3153
3154 void java_lang_invoke_LambdaForm::compute_offsets() {
3155 InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3156 assert (k != NULL, "jdk mismatch");
3157 compute_offset(_vmentry_offset, k, "vmentry", vmSymbols::java_lang_invoke_MemberName_signature());
3158 }
3159
3160 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3161 return obj != NULL && is_subclass(obj->klass());
3162 }
3163
3164
3165 oop java_lang_invoke_MethodHandle::type(oop mh) {
3166 return mh->obj_field(_type_offset);
3167 }
3168
3169 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3170 mh->obj_field_put(_type_offset, mtype);
3171 }
3172
3173 oop java_lang_invoke_MethodHandle::form(oop mh) {
3174 assert(_form_offset != 0, "");
3175 return mh->obj_field(_form_offset);
3176 }
3177
3178 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3179 assert(_form_offset != 0, "");
3180 mh->obj_field_put(_form_offset, lform);
3181 }
3182
3183 /// MemberName accessors
3184
3185 oop java_lang_invoke_MemberName::clazz(oop mname) {
3186 assert(is_instance(mname), "wrong type");
3187 return mname->obj_field(_clazz_offset);
3188 }
3189
3190 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3191 assert(is_instance(mname), "wrong type");
3192 mname->obj_field_put(_clazz_offset, clazz);
3193 }
3194
3195 oop java_lang_invoke_MemberName::name(oop mname) {
3196 assert(is_instance(mname), "wrong type");
3197 return mname->obj_field(_name_offset);
3198 }
3199
3200 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3201 assert(is_instance(mname), "wrong type");
3202 mname->obj_field_put(_name_offset, name);
3203 }
3204
3205 oop java_lang_invoke_MemberName::type(oop mname) {
3206 assert(is_instance(mname), "wrong type");
3207 return mname->obj_field(_type_offset);
3208 }
3209
3210 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3211 assert(is_instance(mname), "wrong type");
3212 mname->obj_field_put(_type_offset, type);
3213 }
3214
3215 int java_lang_invoke_MemberName::flags(oop mname) {
3216 assert(is_instance(mname), "wrong type");
3217 return mname->int_field(_flags_offset);
3218 }
3219
3220 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3221 assert(is_instance(mname), "wrong type");
3222 mname->int_field_put(_flags_offset, flags);
3223 }
3224
3225
3226 // Return vmtarget from ResolvedMethodName method field through indirection
3227 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3228 assert(is_instance(mname), "wrong type");
3229 oop method = mname->obj_field(_method_offset);
3230 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3231 }
3232
3233 bool java_lang_invoke_MemberName::is_method(oop mname) {
3234 assert(is_instance(mname), "must be MemberName");
3235 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3236 }
3237
3238 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3239 assert(is_instance(mname), "wrong type");
3240 mname->obj_field_put(_method_offset, resolved_method);
3241 }
3242
3243 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3244 assert(is_instance(mname), "wrong type");
3245 return (intptr_t) mname->address_field(_vmindex_offset);
3246 }
3247
3248 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3249 assert(is_instance(mname), "wrong type");
3250 mname->address_field_put(_vmindex_offset, (address) index);
3251 }
3252
3253
3254 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3255 assert(is_instance(resolved_method), "wrong type");
3256 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3257 assert(m->is_method(), "must be");
3258 return m;
3259 }
3260
3261 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3262 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3263 assert(is_instance(resolved_method), "wrong type");
3264 resolved_method->address_field_put(_vmtarget_offset, (address)m);
3265 }
3266
3267 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3268 // lookup ResolvedMethod oop in the table, or create a new one and intern it
3269 oop resolved_method = ResolvedMethodTable::find_method(m());
3270 if (resolved_method == NULL) {
3271 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3272 if (!k->is_initialized()) {
3273 k->initialize(CHECK_NULL);
3274 }
3275 oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3276 new_resolved_method->address_field_put(_vmtarget_offset, (address)m());
3277 // Add a reference to the loader (actually mirror because anonymous classes will not have
3278 // distinct loaders) to ensure the metadata is kept alive.
3279 // This mirror may be different than the one in clazz field.
3280 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror());
3281 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method));
3282 }
3283 return resolved_method;
3284 }
3285
3286 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3287 assert(is_instance(lform), "wrong type");
3288 return lform->obj_field(_vmentry_offset);
3289 }
3290
3291
3292 // Support for java_lang_invoke_MethodType
3293
3294 int java_lang_invoke_MethodType::_rtype_offset;
3295 int java_lang_invoke_MethodType::_ptypes_offset;
3296
3297 void java_lang_invoke_MethodType::compute_offsets() {
3298 InstanceKlass* k = SystemDictionary::MethodType_klass();
3299 compute_offset(_rtype_offset, k, "rtype", vmSymbols::class_signature());
3300 compute_offset(_ptypes_offset, k, "ptypes", vmSymbols::class_array_signature());
3301 }
3302
3303 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3304 st->print("(");
3305 objArrayOop pts = ptypes(mt);
3306 for (int i = 0, limit = pts->length(); i < limit; i++) {
3307 java_lang_Class::print_signature(pts->obj_at(i), st);
3308 }
3309 st->print(")");
3310 java_lang_Class::print_signature(rtype(mt), st);
3311 }
3312
3313 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
3314 ResourceMark rm;
3315 stringStream buffer(128);
3316 print_signature(mt, &buffer);
3317 const char* sigstr = buffer.base();
3318 int siglen = (int) buffer.size();
3319 Symbol *name;
3320 if (!intern_if_not_found) {
3321 name = SymbolTable::probe(sigstr, siglen);
3322 } else {
3323 name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
3324 }
3325 return name;
3326 }
3327
3328 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3329 if (mt1 == mt2)
3330 return true;
3331 if (rtype(mt1) != rtype(mt2))
3332 return false;
3333 if (ptype_count(mt1) != ptype_count(mt2))
3334 return false;
3335 for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3336 if (ptype(mt1, i) != ptype(mt2, i))
3337 return false;
3338 }
3339 return true;
3340 }
3341
3342 oop java_lang_invoke_MethodType::rtype(oop mt) {
3343 assert(is_instance(mt), "must be a MethodType");
3344 return mt->obj_field(_rtype_offset);
3345 }
3346
3347 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3348 assert(is_instance(mt), "must be a MethodType");
3349 return (objArrayOop) mt->obj_field(_ptypes_offset);
3350 }
3351
3352 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3353 return ptypes(mt)->obj_at(idx);
3354 }
3355
3356 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3357 return ptypes(mt)->length();
3358 }
3359
3360 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3361 objArrayOop pts = ptypes(mt);
3362 int count = pts->length();
3363 int slots = 0;
3364 for (int i = 0; i < count; i++) {
3365 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3366 slots += type2size[bt];
3367 }
3368 return slots;
3369 }
3370
3371 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3372 BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3373 return type2size[bt];
3374 }
3375
3376
3377 // Support for java_lang_invoke_CallSite
3378
3379 int java_lang_invoke_CallSite::_target_offset;
3380 int java_lang_invoke_CallSite::_context_offset;
3381
3382 void java_lang_invoke_CallSite::compute_offsets() {
3383 InstanceKlass* k = SystemDictionary::CallSite_klass();
3384 compute_offset(_target_offset, k, "target", vmSymbols::java_lang_invoke_MethodHandle_signature());
3385 compute_offset(_context_offset, k, "context",
3386 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
3387 }
3388
3389 oop java_lang_invoke_CallSite::context(oop call_site) {
3390 assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3391
3392 oop dep_oop = call_site->obj_field(_context_offset);
3393 return dep_oop;
3394 }
3395
3396 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3397
3398 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3399
3400 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3401 InstanceKlass* k = SystemDictionary::Context_klass();
3402 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3403 }
3404
3405 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3406 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3407 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset);
3408 DependencyContext dep_ctx(vmdeps_addr);
3409 return dep_ctx;
3410 }
3411
3412 // Support for java_security_AccessControlContext
3413
3414 int java_security_AccessControlContext::_context_offset = 0;
3415 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3416 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3417 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3418
3419 void java_security_AccessControlContext::compute_offsets() {
3420 assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3421 InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3422
3423 compute_offset(_context_offset, k, "context", vmSymbols::protectiondomain_signature());
3424 compute_offset(_privilegedContext_offset, k, "privilegedContext", vmSymbols::accesscontrolcontext_signature());
3425 compute_offset(_isPrivileged_offset, k, "isPrivileged", vmSymbols::bool_signature());
3426 compute_offset(_isAuthorized_offset, k, "isAuthorized", vmSymbols::bool_signature());
3427 }
3428
3429
3430 bool java_security_AccessControlContext::is_authorized(Handle context) {
3431 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3432 assert(_isAuthorized_offset != -1, "should be set");
3433 return context->bool_field(_isAuthorized_offset) != 0;
3434 }
3435
3436 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3437 assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3438 // Ensure klass is initialized
3439 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3440 // Allocate result
3441 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3442 // Fill in values
3443 result->obj_field_put(_context_offset, context());
3444 result->obj_field_put(_privilegedContext_offset, privileged_context());
3445 result->bool_field_put(_isPrivileged_offset, isPrivileged);
3446 // whitelist AccessControlContexts created by the JVM if present
3447 if (_isAuthorized_offset != -1) {
3448 result->bool_field_put(_isAuthorized_offset, true);
3449 }
3450 return result;
3451 }
3452
3453
3454 // Support for java_lang_ClassLoader
3455
3456 bool java_lang_ClassLoader::offsets_computed = false;
3457 int java_lang_ClassLoader::_loader_data_offset = -1;
3458 int java_lang_ClassLoader::parallelCapable_offset = -1;
3459 int java_lang_ClassLoader::name_offset = -1;
3460 int java_lang_ClassLoader::unnamedModule_offset = -1;
3461
3462 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3463 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3464 return HeapAccess<>::load_at(loader, _loader_data_offset);
3465 }
3466
3467 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) {
3468 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3469 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data);
3470 }
3471
3472 void java_lang_ClassLoader::compute_offsets() {
3473 assert(!offsets_computed, "offsets should be initialized only once");
3474 offsets_computed = true;
3475
3476 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3477 compute_offset(parallelCapable_offset,
3478 k1, "parallelLockMap", vmSymbols::concurrenthashmap_signature());
3479
3480 compute_offset(name_offset,
3481 k1, vmSymbols::name_name(), vmSymbols::string_signature());
3482
3483 compute_offset(unnamedModule_offset,
3484 k1, "unnamedModule", vmSymbols::module_signature());
3485
3486 compute_offset(parent_offset, k1, "parent", vmSymbols::classloader_signature());
3487
3488 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3489 }
3490
3491 oop java_lang_ClassLoader::parent(oop loader) {
3492 assert(is_instance(loader), "loader must be oop");
3493 return loader->obj_field(parent_offset);
3494 }
3495
3496 oop java_lang_ClassLoader::name(oop loader) {
3497 assert(is_instance(loader), "loader must be oop");
3498 return loader->obj_field(name_offset);
3499 }
3500
3501 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3502 assert(is_instance(loader), "loader must be oop");
3503 assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3504 oop acl = loader;
3505 debug_only(jint loop_count = 0);
3506 // This loop taken verbatim from ClassLoader.java:
3507 do {
3508 acl = parent(acl);
3509 if (cl == acl) {
3510 return true;
3511 }
3512 assert(++loop_count > 0, "loop_count overflow");
3513 } while (acl != NULL);
3514 return false;
3515 }
3516
3517 bool java_lang_ClassLoader::is_instance(oop obj) {
3518 return obj != NULL && is_subclass(obj->klass());
3519 }
3520
3521
3522 // For class loader classes, parallelCapable defined
3523 // based on non-null field
3524 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3525 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3526 if (parallelCapable_offset == -1) {
3527 // Default for backward compatibility is false
3528 return false;
3529 }
3530 return (class_loader->obj_field(parallelCapable_offset) != NULL);
3531 }
3532
3533 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3534 // Fix for 4474172; see evaluation for more details
3535 loader = non_reflection_class_loader(loader);
3536
3537 oop cl = SystemDictionary::java_system_loader();
3538 while(cl != NULL) {
3539 if (cl == loader) return true;
3540 cl = parent(cl);
3541 }
3542 return false;
3543 }
3544
3545 // Return true if this is one of the class loaders associated with
3546 // the generated bytecodes for reflection.
3547 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3548 if (loader != NULL) {
3549 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3550 // This might be null in non-1.4 JDKs
3551 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3552 }
3553 return false;
3554 }
3555
3556 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3557 // See whether this is one of the class loaders associated with
3558 // the generated bytecodes for reflection, and if so, "magically"
3559 // delegate to its parent to prevent class loading from occurring
3560 // in places where applications using reflection didn't expect it.
3561 if (is_reflection_class_loader(loader)) {
3562 return parent(loader);
3563 }
3564 return loader;
3565 }
3566
3567 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3568 assert(is_instance(loader), "loader must be oop");
3569 return loader->obj_field(unnamedModule_offset);
3570 }
3571
3572 // Support for java_lang_System
3573 //
3574 void java_lang_System::compute_offsets() {
3575 InstanceKlass* k = SystemDictionary::System_klass();
3576 compute_offset(static_in_offset, k, "in", vmSymbols::input_stream_signature(), true);
3577 compute_offset(static_out_offset, k, "out", vmSymbols::print_stream_signature(), true);
3578 compute_offset(static_err_offset, k, "err", vmSymbols::print_stream_signature(), true);
3579 compute_offset(static_security_offset, k, "security", vmSymbols::security_manager_signature(), true);
3580 }
3581
3582 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
3583 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
3584 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
3585
3586
3587 bool java_lang_System::has_security_manager() {
3588 InstanceKlass* ik = SystemDictionary::System_klass();
3589 address addr = ik->static_field_addr(static_security_offset);
3590 if (UseCompressedOops) {
3591 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3592 } else {
3593 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3594 }
3595 }
3596
3597 int java_lang_Class::_klass_offset;
3598 int java_lang_Class::_array_klass_offset;
3599 int java_lang_Class::_oop_size_offset;
3600 int java_lang_Class::_static_oop_field_count_offset;
3601 int java_lang_Class::_class_loader_offset;
3602 int java_lang_Class::_module_offset;
3603 int java_lang_Class::_protection_domain_offset;
3604 int java_lang_Class::_component_mirror_offset;
3605 int java_lang_Class::_init_lock_offset;
3606 int java_lang_Class::_signers_offset;
3607 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3608 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
3609 int java_lang_Throwable::backtrace_offset;
3610 int java_lang_Throwable::detailMessage_offset;
3611 int java_lang_Throwable::stackTrace_offset;
3612 int java_lang_Throwable::depth_offset;
3613 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3614 int java_lang_reflect_AccessibleObject::override_offset;
3615 int java_lang_reflect_Method::clazz_offset;
3616 int java_lang_reflect_Method::name_offset;
3617 int java_lang_reflect_Method::returnType_offset;
3618 int java_lang_reflect_Method::parameterTypes_offset;
3619 int java_lang_reflect_Method::exceptionTypes_offset;
3620 int java_lang_reflect_Method::slot_offset;
3621 int java_lang_reflect_Method::modifiers_offset;
3622 int java_lang_reflect_Method::signature_offset;
3623 int java_lang_reflect_Method::annotations_offset;
3624 int java_lang_reflect_Method::parameter_annotations_offset;
3625 int java_lang_reflect_Method::annotation_default_offset;
3626 int java_lang_reflect_Method::type_annotations_offset;
3627 int java_lang_reflect_Constructor::clazz_offset;
3628 int java_lang_reflect_Constructor::parameterTypes_offset;
3629 int java_lang_reflect_Constructor::exceptionTypes_offset;
3630 int java_lang_reflect_Constructor::slot_offset;
3631 int java_lang_reflect_Constructor::modifiers_offset;
3632 int java_lang_reflect_Constructor::signature_offset;
3633 int java_lang_reflect_Constructor::annotations_offset;
3634 int java_lang_reflect_Constructor::parameter_annotations_offset;
3635 int java_lang_reflect_Constructor::type_annotations_offset;
3636 int java_lang_reflect_Field::clazz_offset;
3637 int java_lang_reflect_Field::name_offset;
3638 int java_lang_reflect_Field::type_offset;
3639 int java_lang_reflect_Field::slot_offset;
3640 int java_lang_reflect_Field::modifiers_offset;
3641 int java_lang_reflect_Field::signature_offset;
3642 int java_lang_reflect_Field::annotations_offset;
3643 int java_lang_reflect_Field::type_annotations_offset;
3644 int java_lang_reflect_Parameter::name_offset;
3645 int java_lang_reflect_Parameter::modifiers_offset;
3646 int java_lang_reflect_Parameter::index_offset;
3647 int java_lang_reflect_Parameter::executable_offset;
3648 int java_lang_boxing_object::value_offset;
3649 int java_lang_boxing_object::long_value_offset;
3650 int java_lang_ref_Reference::referent_offset;
3651 int java_lang_ref_Reference::queue_offset;
3652 int java_lang_ref_Reference::next_offset;
3653 int java_lang_ref_Reference::discovered_offset;
3654 int java_lang_ref_SoftReference::timestamp_offset;
3655 int java_lang_ref_SoftReference::static_clock_offset;
3656 int java_lang_ClassLoader::parent_offset;
3657 int java_lang_System::static_in_offset;
3658 int java_lang_System::static_out_offset;
3659 int java_lang_System::static_err_offset;
3660 int java_lang_System::static_security_offset;
3661 int java_lang_StackTraceElement::methodName_offset;
3662 int java_lang_StackTraceElement::fileName_offset;
3663 int java_lang_StackTraceElement::lineNumber_offset;
3664 int java_lang_StackTraceElement::moduleName_offset;
3665 int java_lang_StackTraceElement::moduleVersion_offset;
3666 int java_lang_StackTraceElement::classLoaderName_offset;
3667 int java_lang_StackTraceElement::declaringClass_offset;
3668 int java_lang_StackTraceElement::declaringClassObject_offset;
3669 int java_lang_StackFrameInfo::_memberName_offset;
3670 int java_lang_StackFrameInfo::_bci_offset;
3671 int java_lang_StackFrameInfo::_version_offset;
3672 int java_lang_LiveStackFrameInfo::_monitors_offset;
3673 int java_lang_LiveStackFrameInfo::_locals_offset;
3674 int java_lang_LiveStackFrameInfo::_operands_offset;
3675 int java_lang_LiveStackFrameInfo::_mode_offset;
3676 int java_lang_AssertionStatusDirectives::classes_offset;
3677 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3678 int java_lang_AssertionStatusDirectives::packages_offset;
3679 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3680 int java_lang_AssertionStatusDirectives::deflt_offset;
3681 int java_nio_Buffer::_limit_offset;
3682 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3683 int reflect_ConstantPool::_oop_offset;
3684 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3685
3686
3687 // Support for java_lang_StackTraceElement
3688 void java_lang_StackTraceElement::compute_offsets() {
3689 InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
3690 compute_offset(declaringClassObject_offset, k, "declaringClassObject", vmSymbols::class_signature());
3691 compute_offset(classLoaderName_offset, k, "classLoaderName", vmSymbols::string_signature());
3692 compute_offset(moduleName_offset, k, "moduleName", vmSymbols::string_signature());
3693 compute_offset(moduleVersion_offset, k, "moduleVersion", vmSymbols::string_signature());
3694 compute_offset(declaringClass_offset, k, "declaringClass", vmSymbols::string_signature());
3695 compute_offset(methodName_offset, k, "methodName", vmSymbols::string_signature());
3696 compute_offset(fileName_offset, k, "fileName", vmSymbols::string_signature());
3697 compute_offset(lineNumber_offset, k, "lineNumber", vmSymbols::int_signature());
3698 }
3699
3700 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3701 element->obj_field_put(fileName_offset, value);
3702 }
3703
3704 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3705 element->obj_field_put(declaringClass_offset, value);
3706 }
3707
3708 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3709 element->obj_field_put(methodName_offset, value);
3710 }
3711
3712 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3713 element->int_field_put(lineNumber_offset, value);
3714 }
3715
3716 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
3717 element->obj_field_put(moduleName_offset, value);
3718 }
3719
3720 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
3721 element->obj_field_put(moduleVersion_offset, value);
3722 }
3723
3724 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
3725 element->obj_field_put(classLoaderName_offset, value);
3726 }
3727
3728 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
3729 element->obj_field_put(declaringClassObject_offset, value);
3730 }
3731
3732 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3733 element->short_field_put(_version_offset, value);
3734 }
3735
3736 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3737 element->int_field_put(_bci_offset, value);
3738 }
3739
3740 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3741 element->obj_field_put(_monitors_offset, value);
3742 }
3743
3744 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3745 element->obj_field_put(_locals_offset, value);
3746 }
3747
3748 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3749 element->obj_field_put(_operands_offset, value);
3750 }
3751
3752 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3753 element->int_field_put(_mode_offset, value);
3754 }
3755
3756 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3757
3758 void java_lang_AssertionStatusDirectives::compute_offsets() {
3759 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
3760 compute_offset(classes_offset, k, "classes", vmSymbols::string_array_signature());
3761 compute_offset(classEnabled_offset, k, "classEnabled", vmSymbols::bool_array_signature());
3762 compute_offset(packages_offset, k, "packages", vmSymbols::string_array_signature());
3763 compute_offset(packageEnabled_offset, k, "packageEnabled", vmSymbols::bool_array_signature());
3764 compute_offset(deflt_offset, k, "deflt", vmSymbols::bool_signature());
3765 }
3766
3767
3768 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3769 o->obj_field_put(classes_offset, val);
3770 }
3771
3772 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3773 o->obj_field_put(classEnabled_offset, val);
3774 }
3775
3776 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3777 o->obj_field_put(packages_offset, val);
3778 }
3779
3780 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3781 o->obj_field_put(packageEnabled_offset, val);
3782 }
3783
3784 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3785 o->bool_field_put(deflt_offset, val);
3786 }
3787
3788
3789 // Support for intrinsification of java.nio.Buffer.checkIndex
3790 int java_nio_Buffer::limit_offset() {
3791 return _limit_offset;
3792 }
3793
3794
3795 void java_nio_Buffer::compute_offsets() {
3796 InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
3797 assert(k != NULL, "must be loaded in 1.4+");
3798 compute_offset(_limit_offset, k, "limit", vmSymbols::int_signature());
3799 }
3800
3801 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3802 if (_owner_offset != 0) return;
3803
3804 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3805 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3806 compute_offset(_owner_offset, k,
3807 "exclusiveOwnerThread", vmSymbols::thread_signature());
3808 }
3809
3810 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3811 assert(_owner_offset != 0, "Must be initialized");
3812 return obj->obj_field(_owner_offset);
3813 }
3814
3815 static int member_offset(int hardcoded_offset) {
3816 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
3817 }
3818
3819 // Compute hard-coded offsets
3820 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3821 // are not available to determine the offset_of_static_fields.
3822 void JavaClasses::compute_hard_coded_offsets() {
3823
3824 // java_lang_boxing_object
3825 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset);
3826 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
3827
3828 // java_lang_ref_Reference
3829 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset);
3830 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset);
3831 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset);
3832 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset);
3833 }
3834
3835
3836 // Compute non-hard-coded field offsets of all the classes in this file
3837 void JavaClasses::compute_offsets() {
3838 // java_lang_Class::compute_offsets was called earlier in bootstrap
3839 java_lang_System::compute_offsets();
3840 java_lang_ClassLoader::compute_offsets();
3841 java_lang_Throwable::compute_offsets();
3842 java_lang_Thread::compute_offsets();
3843 java_lang_ThreadGroup::compute_offsets();
3844 java_lang_AssertionStatusDirectives::compute_offsets();
3845 java_lang_ref_SoftReference::compute_offsets();
3846 java_lang_invoke_MethodHandle::compute_offsets();
3847 java_lang_invoke_DirectMethodHandle::compute_offsets();
3848 java_lang_invoke_MemberName::compute_offsets();
3849 java_lang_invoke_ResolvedMethodName::compute_offsets();
3850 java_lang_invoke_LambdaForm::compute_offsets();
3851 java_lang_invoke_MethodType::compute_offsets();
3852 java_lang_invoke_CallSite::compute_offsets();
3853 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3854 java_security_AccessControlContext::compute_offsets();
3855 // Initialize reflection classes. The layouts of these classes
3856 // changed with the new reflection implementation in JDK 1.4, and
3857 // since the Universe doesn't know what JDK version it is until this
3858 // point we defer computation of these offsets until now.
3859 java_lang_reflect_AccessibleObject::compute_offsets();
3860 java_lang_reflect_Method::compute_offsets();
3861 java_lang_reflect_Constructor::compute_offsets();
3862 java_lang_reflect_Field::compute_offsets();
3863 java_nio_Buffer::compute_offsets();
3864 reflect_ConstantPool::compute_offsets();
3865 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3866 java_lang_reflect_Parameter::compute_offsets();
3867 java_lang_Module::compute_offsets();
3868 java_lang_StackTraceElement::compute_offsets();
3869 java_lang_StackFrameInfo::compute_offsets();
3870 java_lang_LiveStackFrameInfo::compute_offsets();
3871
3872 // generated interpreter code wants to know about the offsets we just computed:
3873 AbstractAssembler::update_delayed_values();
3874 }
3875
3876 #ifndef PRODUCT
3877
3878 // These functions exist to assert the validity of hard-coded field offsets to guard
3879 // against changes in the class files
3880
3881 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3882 EXCEPTION_MARK;
3883 fieldDescriptor fd;
3884 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3885 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3886 InstanceKlass* ik = InstanceKlass::cast(k);
3887 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3888 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH);
3889 if (!ik->find_local_field(f_name, f_sig, &fd)) {
3890 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3891 return false;
3892 }
3893 if (fd.is_static()) {
3894 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3895 return false;
3896 }
3897 if (fd.offset() == hardcoded_offset ) {
3898 return true;
3899 } else {
3900 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3901 klass_name, field_name, hardcoded_offset, fd.offset());
3902 return false;
3903 }
3904 }
3905
3906 // Check the hard-coded field offsets of all the classes in this file
3907
3908 void JavaClasses::check_offsets() {
3909 bool valid = true;
3910
3911 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3912 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3913
3914 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3915 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3916
3917 // Boxed primitive objects (java_lang_boxing_object)
3918
3919 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z");
3920 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3921 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F");
3922 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3923 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B");
3924 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S");
3925 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I");
3926 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3927
3928 // java.lang.ref.Reference
3929
3930 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3931 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3932 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3933 // Fake field
3934 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3935
3936 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3937 }
3938
3939 #endif // PRODUCT
3940
3941 int InjectedField::compute_offset() {
3942 InstanceKlass* ik = InstanceKlass::cast(klass());
3943 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
3944 if (!may_be_java && !fs.access_flags().is_internal()) {
3945 // Only look at injected fields
3946 continue;
3947 }
3948 if (fs.name() == name() && fs.signature() == signature()) {
3949 return fs.offset();
3950 }
3951 }
3952 ResourceMark rm;
3953 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3954 #ifndef PRODUCT
3955 ik->print();
3956 tty->print_cr("all fields:");
3957 for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
3958 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3959 }
3960 #endif //PRODUCT
3961 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class");
3962 return -1;
3963 }
3964
3965 void javaClasses_init() {
3966 JavaClasses::compute_offsets();
3967 JavaClasses::check_offsets();
3968 FilteredFieldsMap::initialize(); // must be done after computing offsets.
3969 }